TY  - JOUR
AU  - Grgur, Branimir
AU  - Marković, Nenad M.
AU  - Lucas, CA
AU  - Ross, Philip N.Jr.
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/356
AB  - The electrochemical oxidation of carbon monoxide and the interfacial structure of the CO adlayer (COads) on platinum low index single crystals, Pt(111), Pt(100) and two reconstruction of Pt(110), were examined using the rotation disk electrode method in combination with the in situ surface X-ray diffraction scattering technique. The mechanism of CO oxidation is discussed on the basis of the findings that, depending on the potential, two energetic states of COads exist on the platinum surfaces. Thus, at lower potentials, weakly bonded states (COads,w) and at higher potentials strongly bonded states (COads,s) are formed. The mechanism of the oxidation of hydrogen-carbon monoxide mixtures is also proposed.
AB  - Korišćenjem tehnike rotirajuće disk elektrode i in-situ tehnike površinske difrakcije X-zraka, ispitivana je reakcija elektrohemijske oksidacije ugljen-monoksida i priroda adsorbovanog CO na monokristalima platine niskih indeksa orijentacije, Pt(111), Pt(100) i dve rekonstrukcije Pt(110). Diskutovan je mehanizam oksidacije CO na osnovu ustanovljenog postojanja dva energetska stanja adsorbovanog ugljen-monoksida, slabo vezanog stanja pri nižim potencijalima i čvrsto vezanog stanja pri višim potencijalima. Takođe je diskutovan mehanizam oksidacije smeša vodonika sa ugljen-monoksidom.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical oxidation of carbon monoxide: From platinum single crystals to low temperature fuel cells catalysts, Part I: Carbon monoxide oxidation onto low index platinum single crystals
T1  - Elektrohemijska oksidacija ugljen-monoksida - od monokristala platine do katalizatora za niskotemperaturne gorivne galvanske spregove, I deo - oksidacija ugljen-monoksida na niskoindeksnim monokristalima platine
EP  - 797
IS  - 11-12
SP  - 785
VL  - 66
UR  - https://hdl.handle.net/21.15107/rcub_technorep_356
ER  - 

@article{
author = "Grgur, Branimir and Marković, Nenad M. and Lucas, CA and Ross, Philip N.Jr.",
year = "2001",
abstract = "The electrochemical oxidation of carbon monoxide and the interfacial structure of the CO adlayer (COads) on platinum low index single crystals, Pt(111), Pt(100) and two reconstruction of Pt(110), were examined using the rotation disk electrode method in combination with the in situ surface X-ray diffraction scattering technique. The mechanism of CO oxidation is discussed on the basis of the findings that, depending on the potential, two energetic states of COads exist on the platinum surfaces. Thus, at lower potentials, weakly bonded states (COads,w) and at higher potentials strongly bonded states (COads,s) are formed. The mechanism of the oxidation of hydrogen-carbon monoxide mixtures is also proposed., Korišćenjem tehnike rotirajuće disk elektrode i in-situ tehnike površinske difrakcije X-zraka, ispitivana je reakcija elektrohemijske oksidacije ugljen-monoksida i priroda adsorbovanog CO na monokristalima platine niskih indeksa orijentacije, Pt(111), Pt(100) i dve rekonstrukcije Pt(110). Diskutovan je mehanizam oksidacije CO na osnovu ustanovljenog postojanja dva energetska stanja adsorbovanog ugljen-monoksida, slabo vezanog stanja pri nižim potencijalima i čvrsto vezanog stanja pri višim potencijalima. Takođe je diskutovan mehanizam oksidacije smeša vodonika sa ugljen-monoksidom.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical oxidation of carbon monoxide: From platinum single crystals to low temperature fuel cells catalysts, Part I: Carbon monoxide oxidation onto low index platinum single crystals, Elektrohemijska oksidacija ugljen-monoksida - od monokristala platine do katalizatora za niskotemperaturne gorivne galvanske spregove, I deo - oksidacija ugljen-monoksida na niskoindeksnim monokristalima platine",
pages = "797-785",
number = "11-12",
volume = "66",
url = "https://hdl.handle.net/21.15107/rcub_technorep_356"
}

Grgur, B., Marković, N. M., Lucas, C.,& Ross, P. N.Jr.. (2001). Electrochemical oxidation of carbon monoxide: From platinum single crystals to low temperature fuel cells catalysts, Part I: Carbon monoxide oxidation onto low index platinum single crystals. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 66(11-12), 785-797.
https://hdl.handle.net/21.15107/rcub_technorep_356

Grgur B, Marković NM, Lucas C, Ross PN. Electrochemical oxidation of carbon monoxide: From platinum single crystals to low temperature fuel cells catalysts, Part I: Carbon monoxide oxidation onto low index platinum single crystals. in Journal of the Serbian Chemical Society. 2001;66(11-12):785-797.
https://hdl.handle.net/21.15107/rcub_technorep_356 .

Grgur, Branimir, Marković, Nenad M., Lucas, CA, Ross, Philip N.Jr., "Electrochemical oxidation of carbon monoxide: From platinum single crystals to low temperature fuel cells catalysts, Part I: Carbon monoxide oxidation onto low index platinum single crystals" in Journal of the Serbian Chemical Society, 66, no. 11-12 (2001):785-797,
https://hdl.handle.net/21.15107/rcub_technorep_356 .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/280
AB  - The surface chemistry of coadsorbed CO and metal adatoms on the Pt(100) surface in acid electrolyte has been studied by means of rotating ring disk electrode (RRDE) measurements. These results showed that Cu and Pb adatoms are readily displaced from the Pt(100) surface by CO. The consequence of the observed displacement phenomenon is that the kinetics of the electrooxidation of CO on Pt(100) surfaces in Cu2+- (Pb2+-) containing solution is the same as in Cu2+- (Pb2+-) free solution.
PB  - Amer Chemical Soc, Washington
T2  - Langmuir
T1  - Surface chemistry of CO on Pt(100)-bimetallic surfaces: Displacement effects
EP  - 2005
IS  - 4
SP  - 1998
VL  - 16
DO  - 10.1021/la990255u
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "2000",
abstract = "The surface chemistry of coadsorbed CO and metal adatoms on the Pt(100) surface in acid electrolyte has been studied by means of rotating ring disk electrode (RRDE) measurements. These results showed that Cu and Pb adatoms are readily displaced from the Pt(100) surface by CO. The consequence of the observed displacement phenomenon is that the kinetics of the electrooxidation of CO on Pt(100) surfaces in Cu2+- (Pb2+-) containing solution is the same as in Cu2+- (Pb2+-) free solution.",
publisher = "Amer Chemical Soc, Washington",
journal = "Langmuir",
title = "Surface chemistry of CO on Pt(100)-bimetallic surfaces: Displacement effects",
pages = "2005-1998",
number = "4",
volume = "16",
doi = "10.1021/la990255u"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (2000). Surface chemistry of CO on Pt(100)-bimetallic surfaces: Displacement effects. in Langmuir
Amer Chemical Soc, Washington., 16(4), 1998-2005.
https://doi.org/10.1021/la990255u

Marković N, Grgur B, Lucas C, Ross P. Surface chemistry of CO on Pt(100)-bimetallic surfaces: Displacement effects. in Langmuir. 2000;16(4):1998-2005.
doi:10.1021/la990255u .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Surface chemistry of CO on Pt(100)-bimetallic surfaces: Displacement effects" in Langmuir, 16, no. 4 (2000):1998-2005,
https://doi.org/10.1021/la990255u . .

TY  - JOUR
AU  - Lucas, CA
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Ross, PN
PY  - 2000
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/283
AB  - Synchrotron surface X-ray scattering (SXS) and rotating ring disk electrode (RRDE) measurements have been performed during the coadsorption of metal adatoms and carbon monoxide on the Pt(100) surface in an electrochemical environment. Whereas RRDE experiments give a macroscopic view of the coadsorption process, via the adsorption isotherms of deposited metal adatoms, the SXS measurements give insight into the structural changes that occur on the atomic level. The results show that both underpotentially deposited (UPD) Cu and Pb are displaced by CO from the Pt(100) surface, the driving force being the resulting negative shift in the surface free energy. When bromide is present in a c(2 x 2) structure on top of the Cu monolayer there is an activation barrier to the displacement effect. Coadsorption of CO then enhances the c(2 x 2) structure by displacing disordered Cu or Br that is present on the surface. Cycling the electrode potential, during which the Cu monolayer is desorbed, leads to complete blocking of the UPD process by CO. In contrast to these results, the reversible formation of a Bi c(2 x 2) UPD adlayer is unaffected by the presence of solution CO.
PB  - Elsevier, Amsterdam
T2  - Surface Science
T1  - Structural effects during CO adsorption on Pt-bimetallic surfaces I. The Pt(100) electrode
EP  - 76
IS  - 2-3
SP  - 65
VL  - 448
DO  - 10.1016/S0039-6028(99)01127-9
ER  - 

@article{
author = "Lucas, CA and Marković, NM and Grgur, Branimir and Ross, PN",
year = "2000",
abstract = "Synchrotron surface X-ray scattering (SXS) and rotating ring disk electrode (RRDE) measurements have been performed during the coadsorption of metal adatoms and carbon monoxide on the Pt(100) surface in an electrochemical environment. Whereas RRDE experiments give a macroscopic view of the coadsorption process, via the adsorption isotherms of deposited metal adatoms, the SXS measurements give insight into the structural changes that occur on the atomic level. The results show that both underpotentially deposited (UPD) Cu and Pb are displaced by CO from the Pt(100) surface, the driving force being the resulting negative shift in the surface free energy. When bromide is present in a c(2 x 2) structure on top of the Cu monolayer there is an activation barrier to the displacement effect. Coadsorption of CO then enhances the c(2 x 2) structure by displacing disordered Cu or Br that is present on the surface. Cycling the electrode potential, during which the Cu monolayer is desorbed, leads to complete blocking of the UPD process by CO. In contrast to these results, the reversible formation of a Bi c(2 x 2) UPD adlayer is unaffected by the presence of solution CO.",
publisher = "Elsevier, Amsterdam",
journal = "Surface Science",
title = "Structural effects during CO adsorption on Pt-bimetallic surfaces I. The Pt(100) electrode",
pages = "76-65",
number = "2-3",
volume = "448",
doi = "10.1016/S0039-6028(99)01127-9"
}

Lucas, C., Marković, N., Grgur, B.,& Ross, P.. (2000). Structural effects during CO adsorption on Pt-bimetallic surfaces I. The Pt(100) electrode. in Surface Science
Elsevier, Amsterdam., 448(2-3), 65-76.
https://doi.org/10.1016/S0039-6028(99)01127-9

Lucas C, Marković N, Grgur B, Ross P. Structural effects during CO adsorption on Pt-bimetallic surfaces I. The Pt(100) electrode. in Surface Science. 2000;448(2-3):65-76.
doi:10.1016/S0039-6028(99)01127-9 .

Lucas, CA, Marković, NM, Grgur, Branimir, Ross, PN, "Structural effects during CO adsorption on Pt-bimetallic surfaces I. The Pt(100) electrode" in Surface Science, 448, no. 2-3 (2000):65-76,
https://doi.org/10.1016/S0039-6028(99)01127-9 . .

TY  - JOUR
AU  - Marković, NM
AU  - Lucas, CA
AU  - Grgur, Branimir
AU  - Ross, PN
PY  - 1999
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/253
AB  - The Pt(100)-CO interaction in aqueous electrolytes was examined by using rotating disk methods in combination with in-situ surface X-ray scattering (SXS) measurements. The analysis of the SXS results indicates that the topmost platinum atoms expand away from the second layer by ca. 4% when H-upd was completely displaced from Pt(100) by CO to form a saturated layer of CO. Assuming that gas-phase heats of adsorption for CO apply as well to the liquid-solid interface, we estimate that the Gibbs energy change for the displacement of Hupd by CO On Pt(100) is close to -90 kJ/mol. A Pt(100)-CO surface normal interlayer spacing of 1.4 +/- 0.4 Angstrom was extracted from SXS measurements, suggesting that CO is adsorbed primarily at the 2-fold bridge-bonded sites, or possibly a mixture of bridge and atop sites. In contrast to the Pt(111)-CO system, no structures of COad with long-range order were formed on Pt(100). Two different forms of COad are formed at the Pt(100)-electrolyte interface: the weakly adsorbed state which is oxidized in the pre-ignition potential region, and the strongly adsorbed state which is oxidized in the ignition potential region. Although the nature of COad is different before and after the ignition potential, we proposed that the mechanism for CO oxidation on Pt(100) is the same in both the pre-ignition and ignition potential regions, e.g., adsorbed CO reacts with hydroxyl species (OHad) through a Langmuir-Hinshelwood type reaction. The kinetics of CO oxidation on Pt(hkl) surfaces is found to vary with crystal face. The difference in activity is attributed to the structure-sensitive adsorption of CO, OHad, and anions from the supporting electrolytes.
PB  - Amer Chemical Soc, Washington
T2  - Journal of Physical Chemistry B
T1  - Surface electrochemistry of CO and H-2/CO mixtures at Pt(100) interface: Electrode kinetics and interfacial structures
EP  - 9623
IS  - 44
SP  - 9616
VL  - 103
DO  - 10.1021/jp991566g
ER  - 

@article{
author = "Marković, NM and Lucas, CA and Grgur, Branimir and Ross, PN",
year = "1999",
abstract = "The Pt(100)-CO interaction in aqueous electrolytes was examined by using rotating disk methods in combination with in-situ surface X-ray scattering (SXS) measurements. The analysis of the SXS results indicates that the topmost platinum atoms expand away from the second layer by ca. 4% when H-upd was completely displaced from Pt(100) by CO to form a saturated layer of CO. Assuming that gas-phase heats of adsorption for CO apply as well to the liquid-solid interface, we estimate that the Gibbs energy change for the displacement of Hupd by CO On Pt(100) is close to -90 kJ/mol. A Pt(100)-CO surface normal interlayer spacing of 1.4 +/- 0.4 Angstrom was extracted from SXS measurements, suggesting that CO is adsorbed primarily at the 2-fold bridge-bonded sites, or possibly a mixture of bridge and atop sites. In contrast to the Pt(111)-CO system, no structures of COad with long-range order were formed on Pt(100). Two different forms of COad are formed at the Pt(100)-electrolyte interface: the weakly adsorbed state which is oxidized in the pre-ignition potential region, and the strongly adsorbed state which is oxidized in the ignition potential region. Although the nature of COad is different before and after the ignition potential, we proposed that the mechanism for CO oxidation on Pt(100) is the same in both the pre-ignition and ignition potential regions, e.g., adsorbed CO reacts with hydroxyl species (OHad) through a Langmuir-Hinshelwood type reaction. The kinetics of CO oxidation on Pt(hkl) surfaces is found to vary with crystal face. The difference in activity is attributed to the structure-sensitive adsorption of CO, OHad, and anions from the supporting electrolytes.",
publisher = "Amer Chemical Soc, Washington",
journal = "Journal of Physical Chemistry B",
title = "Surface electrochemistry of CO and H-2/CO mixtures at Pt(100) interface: Electrode kinetics and interfacial structures",
pages = "9623-9616",
number = "44",
volume = "103",
doi = "10.1021/jp991566g"
}

Marković, N., Lucas, C., Grgur, B.,& Ross, P.. (1999). Surface electrochemistry of CO and H-2/CO mixtures at Pt(100) interface: Electrode kinetics and interfacial structures. in Journal of Physical Chemistry B
Amer Chemical Soc, Washington., 103(44), 9616-9623.
https://doi.org/10.1021/jp991566g

Marković N, Lucas C, Grgur B, Ross P. Surface electrochemistry of CO and H-2/CO mixtures at Pt(100) interface: Electrode kinetics and interfacial structures. in Journal of Physical Chemistry B. 1999;103(44):9616-9623.
doi:10.1021/jp991566g .

Marković, NM, Lucas, CA, Grgur, Branimir, Ross, PN, "Surface electrochemistry of CO and H-2/CO mixtures at Pt(100) interface: Electrode kinetics and interfacial structures" in Journal of Physical Chemistry B, 103, no. 44 (1999):9616-9623,
https://doi.org/10.1021/jp991566g . .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 1999
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/247
AB  - Electrocatalysis of CO oxidation and the interfacial structure of the CO adlayer (COad) on the Pt(111) surface in 0.5 M H2SO4 were examined by using the rotating disk electrode method in combination with in situ surface X-ray diffraction measurements. The results presented here elucidate the roles played by two different forms of COad: one which is oxidized at lower overpotentials, in the so-called preoxidation region, we characterize as a weakly adsorbed state (COad.w), and a strongly adsorbed state (COad,s) which is oxidized at higher overpotentials. The COad,w state forms at saturation coverage by adsorption at E  lt  0.15 V and assumes a compressed p(2 x 2) structure containing 3 CO molecules in the unit cell (0.75 CO/Pt). We propose that oxidative removal of COad,w is accompanied by simultaneous relaxation of the CO adlayer, and that the remaining COad (approximate to 0.6 CO/Pt) assumes a new bonding state which we identify as COad,s. The COad,s state is present in a structure lacking long-range order. Despite the reduced coverage by COad, H-2 electrooxidation is still completely poisoned at potentials below 0.6 V. The electrooxidation of CO in solution is proposed to occur via the COad,w state at 0.6-0.8 V, and via the COad,s at higher potentials.
PB  - Amer Chemical Soc, Washington
T2  - Journal of Physical Chemistry B
T1  - Electrooxidation of CO and H-2/CO mixtures on Pt(111) in acid solutions
EP  - 495
IS  - 3
SP  - 487
VL  - 103
DO  - 10.1021/jp983177c
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "1999",
abstract = "Electrocatalysis of CO oxidation and the interfacial structure of the CO adlayer (COad) on the Pt(111) surface in 0.5 M H2SO4 were examined by using the rotating disk electrode method in combination with in situ surface X-ray diffraction measurements. The results presented here elucidate the roles played by two different forms of COad: one which is oxidized at lower overpotentials, in the so-called preoxidation region, we characterize as a weakly adsorbed state (COad.w), and a strongly adsorbed state (COad,s) which is oxidized at higher overpotentials. The COad,w state forms at saturation coverage by adsorption at E  lt  0.15 V and assumes a compressed p(2 x 2) structure containing 3 CO molecules in the unit cell (0.75 CO/Pt). We propose that oxidative removal of COad,w is accompanied by simultaneous relaxation of the CO adlayer, and that the remaining COad (approximate to 0.6 CO/Pt) assumes a new bonding state which we identify as COad,s. The COad,s state is present in a structure lacking long-range order. Despite the reduced coverage by COad, H-2 electrooxidation is still completely poisoned at potentials below 0.6 V. The electrooxidation of CO in solution is proposed to occur via the COad,w state at 0.6-0.8 V, and via the COad,s at higher potentials.",
publisher = "Amer Chemical Soc, Washington",
journal = "Journal of Physical Chemistry B",
title = "Electrooxidation of CO and H-2/CO mixtures on Pt(111) in acid solutions",
pages = "495-487",
number = "3",
volume = "103",
doi = "10.1021/jp983177c"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1999). Electrooxidation of CO and H-2/CO mixtures on Pt(111) in acid solutions. in Journal of Physical Chemistry B
Amer Chemical Soc, Washington., 103(3), 487-495.
https://doi.org/10.1021/jp983177c

Marković N, Grgur B, Lucas C, Ross P. Electrooxidation of CO and H-2/CO mixtures on Pt(111) in acid solutions. in Journal of Physical Chemistry B. 1999;103(3):487-495.
doi:10.1021/jp983177c .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Electrooxidation of CO and H-2/CO mixtures on Pt(111) in acid solutions" in Journal of Physical Chemistry B, 103, no. 3 (1999):487-495,
https://doi.org/10.1021/jp983177c . .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, P
PY  - 1998
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/205
AB  - The results presented in this study show definitely that copper deposition in perchloric acid is a very slow, kinetically controlled process. In nearly halide free supporting electrolytes du appeared to be deposited at underpotential in metallic islands (or 'patches') having the platinum lattice constant. The presence of Br- anions significantly enhances the kinetics of the Cu UPD on the Pt(100) electrode. The total amount of Cu deposited at underpotential is ca. 1 ML (1 ML = 1 Cu adatom per Pt atom). The results obtained from the surface X-ray diffraction measurements showed the formation of an ordered structure of Pr into a c(2 x 2) unit cell on the top of a p(1 x 1) pseudomorphic layer of Cu. In a solution free of Cu no ordered structure of Pr has been found on Pt(100). RRDE and SXS results indicate beyond any doubt that the surface coverage by Br undergoes only negligible changes upon the deposition of Cu even up to a nominal monolayer. We propose, therefore, that the mechanism of Cu UPD occurs by displacement of bromine adatoms from the Pt surface by Cu adatoms through a 'turn-over' process in which Cu is sandwiched between the Pt surface and the Brad overlayer, i.e. a Pt(100)-Cu-Br bi-layer structure.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - UPD of Cu on Pt(100): effects of anions on adsorption isotherms and interface structures
EP  - 1017
IS  - 6-7
SP  - 1009
VL  - 44
DO  - 10.1016/S0013-4686(98)00205-9
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, P",
year = "1998",
abstract = "The results presented in this study show definitely that copper deposition in perchloric acid is a very slow, kinetically controlled process. In nearly halide free supporting electrolytes du appeared to be deposited at underpotential in metallic islands (or 'patches') having the platinum lattice constant. The presence of Br- anions significantly enhances the kinetics of the Cu UPD on the Pt(100) electrode. The total amount of Cu deposited at underpotential is ca. 1 ML (1 ML = 1 Cu adatom per Pt atom). The results obtained from the surface X-ray diffraction measurements showed the formation of an ordered structure of Pr into a c(2 x 2) unit cell on the top of a p(1 x 1) pseudomorphic layer of Cu. In a solution free of Cu no ordered structure of Pr has been found on Pt(100). RRDE and SXS results indicate beyond any doubt that the surface coverage by Br undergoes only negligible changes upon the deposition of Cu even up to a nominal monolayer. We propose, therefore, that the mechanism of Cu UPD occurs by displacement of bromine adatoms from the Pt surface by Cu adatoms through a 'turn-over' process in which Cu is sandwiched between the Pt surface and the Brad overlayer, i.e. a Pt(100)-Cu-Br bi-layer structure.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "UPD of Cu on Pt(100): effects of anions on adsorption isotherms and interface structures",
pages = "1017-1009",
number = "6-7",
volume = "44",
doi = "10.1016/S0013-4686(98)00205-9"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1998). UPD of Cu on Pt(100): effects of anions on adsorption isotherms and interface structures. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 44(6-7), 1009-1017.
https://doi.org/10.1016/S0013-4686(98)00205-9

Marković N, Grgur B, Lucas C, Ross P. UPD of Cu on Pt(100): effects of anions on adsorption isotherms and interface structures. in Electrochimica Acta. 1998;44(6-7):1009-1017.
doi:10.1016/S0013-4686(98)00205-9 .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, P, "UPD of Cu on Pt(100): effects of anions on adsorption isotherms and interface structures" in Electrochimica Acta, 44, no. 6-7 (1998):1009-1017,
https://doi.org/10.1016/S0013-4686(98)00205-9 . .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 1998
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/194
AB  - The underpotential deposition (UPD) of Pb onto Pt(100) in pure perchloric acid and in solution containing Br- was examined by classical rotating ring disk electrode (RRDPt(100)E) electrochemical methods in combination with in-situ surface X-ray scattering measurements. The total amount of Pb deposited underpotentially in 0.1 M HClO4 is approximate to 0.62 +/- 5% ML (1 ML equals 1 Pb atom per Pt surface atom), nearly equivalent to a close-packed monolayer of fully discharged Pb adatoms, e.g. 0.63 ML. In pure perchloric acid, deposition of Pb adatoms is accompanied by complete displacement of OHad from the Pt(100) surface, and in the potential range 0.15 V  lt  E  lt  0.35 V we found an ordered surface structure with a c(2 x 2) unit cell. In perchloric acid containing bromide, the maximum Pb-upd surface coverage is approximate to 0.5 ML; the deposition of 0.5 ML of Pb adatoms is accompanied by desorption of about 0.22 ML of the Br-ad adsorbed on the Pt surface at 0.6 V (ca. 0.42 ML). Thus, Pb UPD on Pt(100) from solution containing Br- is a competitive process, with the total amount of Pb deposited at underpotential being less than the amount needed to form a close-packed monolayer. As a consequence, the formation of an ordered c(2 x 2) structure is observed only at E  lt  0.15 V.
PB  - Royal Soc Chemistry, Cambridge
T2  - Journal of the Chemical Society-Faraday Transactions
T1  - Underpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structures
EP  - 3379
IS  - 22
SP  - 3373
VL  - 94
DO  - 10.1039/a804620d
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "1998",
abstract = "The underpotential deposition (UPD) of Pb onto Pt(100) in pure perchloric acid and in solution containing Br- was examined by classical rotating ring disk electrode (RRDPt(100)E) electrochemical methods in combination with in-situ surface X-ray scattering measurements. The total amount of Pb deposited underpotentially in 0.1 M HClO4 is approximate to 0.62 +/- 5% ML (1 ML equals 1 Pb atom per Pt surface atom), nearly equivalent to a close-packed monolayer of fully discharged Pb adatoms, e.g. 0.63 ML. In pure perchloric acid, deposition of Pb adatoms is accompanied by complete displacement of OHad from the Pt(100) surface, and in the potential range 0.15 V  lt  E  lt  0.35 V we found an ordered surface structure with a c(2 x 2) unit cell. In perchloric acid containing bromide, the maximum Pb-upd surface coverage is approximate to 0.5 ML; the deposition of 0.5 ML of Pb adatoms is accompanied by desorption of about 0.22 ML of the Br-ad adsorbed on the Pt surface at 0.6 V (ca. 0.42 ML). Thus, Pb UPD on Pt(100) from solution containing Br- is a competitive process, with the total amount of Pb deposited at underpotential being less than the amount needed to form a close-packed monolayer. As a consequence, the formation of an ordered c(2 x 2) structure is observed only at E  lt  0.15 V.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "Journal of the Chemical Society-Faraday Transactions",
title = "Underpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structures",
pages = "3379-3373",
number = "22",
volume = "94",
doi = "10.1039/a804620d"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1998). Underpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structures. in Journal of the Chemical Society-Faraday Transactions
Royal Soc Chemistry, Cambridge., 94(22), 3373-3379.
https://doi.org/10.1039/a804620d

Marković N, Grgur B, Lucas C, Ross P. Underpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structures. in Journal of the Chemical Society-Faraday Transactions. 1998;94(22):3373-3379.
doi:10.1039/a804620d .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Underpotential deposition of lead onto Pt(100) in acid solutions: Adsorption isotherms and interface structures" in Journal of the Chemical Society-Faraday Transactions, 94, no. 22 (1998):3373-3379,
https://doi.org/10.1039/a804620d . .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 1998
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/210
AB  - The underpotential deposition (upd) of Pb onto Pt(lll) in solution containing Br- was examined by classical RRDP(111)E electrochemical methods in combination with in situ surface X-ray scattering measurements. The results show that Pb upd onto Pt(lll) in the presence of bromide is a competitive process with the total amount of Pb deposited at underpotential being only ca. 0.51 +/- 5% ML, less than the amount needed to form a close-packed monolayer, 0.63 ML (1 ML equals 1 Pb atom per Pt surface atom). Deposition of Pb adatoms is accompanied by desorption of about one-half of the bromide adsorbed on the Pt surface at higher potentials, leaving co-adsorbed bromide both in and on-top-of the adlayer. In the potential region where the ratio of co-adsorbed species is close to one (E approximate to OV) there is the slow formation (over a period of ca. 2h) of an ordered surface alloy, which has a p(2 x 2) unit cell. No other ordered structures of Pb are observed in the underpotential region.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies
EP  - 188
IS  - 2
SP  - 183
VL  - 448
DO  - 10.1016/S0022-0728(97)00012-0
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "1998",
abstract = "The underpotential deposition (upd) of Pb onto Pt(lll) in solution containing Br- was examined by classical RRDP(111)E electrochemical methods in combination with in situ surface X-ray scattering measurements. The results show that Pb upd onto Pt(lll) in the presence of bromide is a competitive process with the total amount of Pb deposited at underpotential being only ca. 0.51 +/- 5% ML, less than the amount needed to form a close-packed monolayer, 0.63 ML (1 ML equals 1 Pb atom per Pt surface atom). Deposition of Pb adatoms is accompanied by desorption of about one-half of the bromide adsorbed on the Pt surface at higher potentials, leaving co-adsorbed bromide both in and on-top-of the adlayer. In the potential region where the ratio of co-adsorbed species is close to one (E approximate to OV) there is the slow formation (over a period of ca. 2h) of an ordered surface alloy, which has a p(2 x 2) unit cell. No other ordered structures of Pb are observed in the underpotential region.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies",
pages = "188-183",
number = "2",
volume = "448",
doi = "10.1016/S0022-0728(97)00012-0"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1998). Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 448(2), 183-188.
https://doi.org/10.1016/S0022-0728(97)00012-0

Marković N, Grgur B, Lucas C, Ross P. Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies. in Journal of Electroanalytical Chemistry. 1998;448(2):183-188.
doi:10.1016/S0022-0728(97)00012-0 .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Underpotential deposition of lead on Pt(111) in the presence of bromide: RRDPt(111)E and X-ray scattering studies" in Journal of Electroanalytical Chemistry, 448, no. 2 (1998):183-188,
https://doi.org/10.1016/S0022-0728(97)00012-0 . .

TY  - JOUR
AU  - Marković, NM
AU  - Grgur, Branimir
AU  - Lucas, CA
AU  - Ross, PN
PY  - 1997
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/130
AB  - A new type of flame-annealing method has been developed for the preparation of surfaces having either fcc(110)-(1x1) or fcc(110)-(1 x 2) symmetry. In situ X-ray scattering studies show that both the Pt(110)-(1 x 2) and Pt(110)-(1 x 1) surfaces are stable in the potential region between 0 and 1.0 V. Adsorption of CO on the (1 x 2) surface in solution does not induce the (1 x 2)-- gt (1 x 1) transition that is observed in UHV upon adsorption of CO. Nominally identical saturation coverages of hydrogen (H-upd) and COad are observed on the two surfaces, implying that two H-upd atoms or two COad molecules are adsorbed per unit cell of the reconstructed (1 x 2) surface. A significant increase in the interatomic spacing between the first and second layer of the reconstructed (1 x 2) surface occurs upon hydrogen adsorption to full coverage. Occupation of subsurface sites for H-upd are inferred from this result. The (1 x 2) surface is found to have a much higher catalytic activity for the electro-oxidation of CO; the anodic oxidation of either COad or dissolved COgas occurs at approximate to 0.3 V lower potential on the (1 x 2) than the (1 x 1) surface.
PB  - Elsevier Science Bv, Amsterdam
T2  - Surface Science
T1  - Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces
EP  - L814
IS  - 1-3
SP  - L805
VL  - 384
DO  - 10.1016/S0039-6028(97)00252-5
ER  - 

@article{
author = "Marković, NM and Grgur, Branimir and Lucas, CA and Ross, PN",
year = "1997",
abstract = "A new type of flame-annealing method has been developed for the preparation of surfaces having either fcc(110)-(1x1) or fcc(110)-(1 x 2) symmetry. In situ X-ray scattering studies show that both the Pt(110)-(1 x 2) and Pt(110)-(1 x 1) surfaces are stable in the potential region between 0 and 1.0 V. Adsorption of CO on the (1 x 2) surface in solution does not induce the (1 x 2)-- gt (1 x 1) transition that is observed in UHV upon adsorption of CO. Nominally identical saturation coverages of hydrogen (H-upd) and COad are observed on the two surfaces, implying that two H-upd atoms or two COad molecules are adsorbed per unit cell of the reconstructed (1 x 2) surface. A significant increase in the interatomic spacing between the first and second layer of the reconstructed (1 x 2) surface occurs upon hydrogen adsorption to full coverage. Occupation of subsurface sites for H-upd are inferred from this result. The (1 x 2) surface is found to have a much higher catalytic activity for the electro-oxidation of CO; the anodic oxidation of either COad or dissolved COgas occurs at approximate to 0.3 V lower potential on the (1 x 2) than the (1 x 1) surface.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Surface Science",
title = "Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces",
pages = "L814-L805",
number = "1-3",
volume = "384",
doi = "10.1016/S0039-6028(97)00252-5"
}

Marković, N., Grgur, B., Lucas, C.,& Ross, P.. (1997). Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces. in Surface Science
Elsevier Science Bv, Amsterdam., 384(1-3), L805-L814.
https://doi.org/10.1016/S0039-6028(97)00252-5

Marković N, Grgur B, Lucas C, Ross P. Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces. in Surface Science. 1997;384(1-3):L805-L814.
doi:10.1016/S0039-6028(97)00252-5 .

Marković, NM, Grgur, Branimir, Lucas, CA, Ross, PN, "Surface electrochemistry of CO on Pt(110)-(1x2) and Pt(110)-(1x1) surfaces" in Surface Science, 384, no. 1-3 (1997):L805-L814,
https://doi.org/10.1016/S0039-6028(97)00252-5 . .