Zabinski, Piotr

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orcid::0000-0002-5085-2645
  • Zabinski, Piotr (4)

Author's Bibliography

Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate

Petričević, Aleksandar; Jović, Vladimir D.; Krstajić Pajić, Mila N.; Zabinski, Piotr; Elezović, Nevenka R.

(Engineers Society for Corrosion, 2022)

TY  - JOUR
AU  - Petričević, Aleksandar
AU  - Jović, Vladimir D.
AU  - Krstajić Pajić, Mila N.
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5353
AB  - Catalytic activity towards the oxygen reduction reaction (ORR) in 0.5 M H2SO4 was investigated at sub-monolayers and ultra-thin layers (corresponding to 10, 30 and 100 monolayers, (MLs)) of Pt electrochemically deposited on (Nb-Ti)2AlC substrate. Electrochemical deposition of Pt layers on (Nb-Ti)2AlC substrate was achieved from the solution containing 3 mM K2PtCl4 + 0.5 M NaCl (pH 4) under the conditions of convective diffusion (RPM = 400) using linear sweep voltammetry (LSV) at a sweep rate of 2 mV s-1, by determining limiting potential for deposition of each Pt sample from the QPt vs. E curves. The Pt samples were characterized X-ray photoelectron spectroscopy (XPS). XPS analysis showed that practically the whole surface of (Nb-Ti)2AlC substrate is covered with homogeneous layer of Pt, while Pt ion reduction was complete to metallic form – Pt(0) valence state. Then oxygen reduction was studied at rotating disc electrode by cyclic voltammetry and linear sweep voltammetry. Two different Tafel slopes were observed, one close to 60 mV dec-1 in low current densities region and second one ~ 120 mV dec-1 in high current densities region. This novel catalyst exhibited higher activity in comparison to carbon supported one, in terms of mass activity – kinetic current density normalized to Pt loading.
AB  - Ispitivana je reakcija redukcije kiseonika na tankim slojevima platine u 0.5 mol dm-3 H2SO4. Tanki
slojevi platine – čija količina naelektrisanja odgovara 10, 30 i 100 teorijskih monoslojeva Pt su
istaloženi na nosaču od (Nb-Ti)2AlC. Za elektrohemijsko taloženje je korišćen rastvor 3 mM
K2PtCl4 + 0.5 M NaCl pH = 4, u uslovima konvektivne difuzije (RPM = 400) primenom metode
linearne skenirajuće voltametrije (LSV) pri brzini promene potencijala od 2 mV s-1
. Elektrohemijski
dobijeni platinski katalizatori na pomenutom nosaču su okarakterisani metodom fotoelektronske
spektroskopija X-zraka (XPS), kao i elektrohemijskim tehnikama.
Za određivanje realne elektrohemijski aktivne površine elektrode je primenjena ciklična
voltametrija, integracijom ispod anodnog dela voltamograma u oblasti adsorpcije vodonika na
potpotencijalima. Za ispitivanje kinetike reakcije redukcije kiseonika je korišćena metoda linearne
skenirajuće voltametrije na rotirajućoj disk elektrodi. Dobijene su dve vrednosti Tafelovog nagiba,
jedna približno 60 mV dek-1
u oblasti malih prenapetosti, a druga ~ 120 mV dek-1
, u oblasti većih
gustina struje. Katalitička aktivnost katalizatora je poređena sa vrednostima iz literature dobijenim
na platini na ugljeničim nosačima na 0.85 V prema reverzibilnoj vodoničnoj elektrodi, izražena kao
kinetička gustina struje po realnoj površini electrode, ili specifična aktivnost – izražena kao
kinetička gustina struje po masi platine. Pokazano je da katalizator sa 10 monoslojeva platine
poseduje veoma dobru katalitičku aktivnost, posebno izraženu po masi istaložene platine.
PB  - Engineers Society for Corrosion
T2  - Zaštita materijala
T1  - Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate
T1  - Reakcija redukcije kiseonika na elektrohemijski istaloženim tankim slojevima platine na (Nb-Ti)2alc nosaču
EP  - 164
IS  - 2
SP  - 153
VL  - 63
DO  - 10.5937/zasmat2202153P
ER  - 
@article{
author = "Petričević, Aleksandar and Jović, Vladimir D. and Krstajić Pajić, Mila N. and Zabinski, Piotr and Elezović, Nevenka R.",
year = "2022",
abstract = "Catalytic activity towards the oxygen reduction reaction (ORR) in 0.5 M H2SO4 was investigated at sub-monolayers and ultra-thin layers (corresponding to 10, 30 and 100 monolayers, (MLs)) of Pt electrochemically deposited on (Nb-Ti)2AlC substrate. Electrochemical deposition of Pt layers on (Nb-Ti)2AlC substrate was achieved from the solution containing 3 mM K2PtCl4 + 0.5 M NaCl (pH 4) under the conditions of convective diffusion (RPM = 400) using linear sweep voltammetry (LSV) at a sweep rate of 2 mV s-1, by determining limiting potential for deposition of each Pt sample from the QPt vs. E curves. The Pt samples were characterized X-ray photoelectron spectroscopy (XPS). XPS analysis showed that practically the whole surface of (Nb-Ti)2AlC substrate is covered with homogeneous layer of Pt, while Pt ion reduction was complete to metallic form – Pt(0) valence state. Then oxygen reduction was studied at rotating disc electrode by cyclic voltammetry and linear sweep voltammetry. Two different Tafel slopes were observed, one close to 60 mV dec-1 in low current densities region and second one ~ 120 mV dec-1 in high current densities region. This novel catalyst exhibited higher activity in comparison to carbon supported one, in terms of mass activity – kinetic current density normalized to Pt loading., Ispitivana je reakcija redukcije kiseonika na tankim slojevima platine u 0.5 mol dm-3 H2SO4. Tanki
slojevi platine – čija količina naelektrisanja odgovara 10, 30 i 100 teorijskih monoslojeva Pt su
istaloženi na nosaču od (Nb-Ti)2AlC. Za elektrohemijsko taloženje je korišćen rastvor 3 mM
K2PtCl4 + 0.5 M NaCl pH = 4, u uslovima konvektivne difuzije (RPM = 400) primenom metode
linearne skenirajuće voltametrije (LSV) pri brzini promene potencijala od 2 mV s-1
. Elektrohemijski
dobijeni platinski katalizatori na pomenutom nosaču su okarakterisani metodom fotoelektronske
spektroskopija X-zraka (XPS), kao i elektrohemijskim tehnikama.
Za određivanje realne elektrohemijski aktivne površine elektrode je primenjena ciklična
voltametrija, integracijom ispod anodnog dela voltamograma u oblasti adsorpcije vodonika na
potpotencijalima. Za ispitivanje kinetike reakcije redukcije kiseonika je korišćena metoda linearne
skenirajuće voltametrije na rotirajućoj disk elektrodi. Dobijene su dve vrednosti Tafelovog nagiba,
jedna približno 60 mV dek-1
u oblasti malih prenapetosti, a druga ~ 120 mV dek-1
, u oblasti većih
gustina struje. Katalitička aktivnost katalizatora je poređena sa vrednostima iz literature dobijenim
na platini na ugljeničim nosačima na 0.85 V prema reverzibilnoj vodoničnoj elektrodi, izražena kao
kinetička gustina struje po realnoj površini electrode, ili specifična aktivnost – izražena kao
kinetička gustina struje po masi platine. Pokazano je da katalizator sa 10 monoslojeva platine
poseduje veoma dobru katalitičku aktivnost, posebno izraženu po masi istaložene platine.",
publisher = "Engineers Society for Corrosion",
journal = "Zaštita materijala",
title = "Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate, Reakcija redukcije kiseonika na elektrohemijski istaloženim tankim slojevima platine na (Nb-Ti)2alc nosaču",
pages = "164-153",
number = "2",
volume = "63",
doi = "10.5937/zasmat2202153P"
}
Petričević, A., Jović, V. D., Krstajić Pajić, M. N., Zabinski, P.,& Elezović, N. R.. (2022). Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate. in Zaštita materijala
Engineers Society for Corrosion., 63(2), 153-164.
https://doi.org/10.5937/zasmat2202153P
Petričević A, Jović VD, Krstajić Pajić MN, Zabinski P, Elezović NR. Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate. in Zaštita materijala. 2022;63(2):153-164.
doi:10.5937/zasmat2202153P .
Petričević, Aleksandar, Jović, Vladimir D., Krstajić Pajić, Mila N., Zabinski, Piotr, Elezović, Nevenka R., "Oxygen reduction reaction on electrochemically deposited sub-monolayers and ultra-thin layers of Pt on (Nb-Ti)2AlC substrate" in Zaštita materijala, 63, no. 2 (2022):153-164,
https://doi.org/10.5937/zasmat2202153P . .
10
9

The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings

Ridosic, Marija; Salicio-Paz, Asier; Garcia-Lecina, Eva; Zabinski, Piotr; Zivkovic, Ljiljana S.; Bajat, Jelena

(2021)

TY  - JOUR
AU  - Ridosic, Marija
AU  - Salicio-Paz, Asier
AU  - Garcia-Lecina, Eva
AU  - Zabinski, Piotr
AU  - Zivkovic, Ljiljana S.
AU  - Bajat, Jelena
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4874
AB  - The goal of this research was to develop and analyse novel Zn-Co-CeO2 protective coatings on steel. Two different sources of ceria (CeO2) particles were employed: commercial powder and synthesized stable colloidal dispersion-sol. The plating solution was agitated by ultrasounds (20 and 30 W cm(-2)) or by magnetic stirrer (300 rpm) during electrodeposition. The CeO2 particles used were characterized by different methods, namely scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) to compare the morphology, crystallinity and particle size. The morphology of developed composite coatings was analysed by SEM, the preferred texture was calculated based on XRD results and corrosion behaviour was evaluated by electrochemical impedance spectroscopy (EIS) and polarization measurements. Utilizing ultrasounds during electrodeposition resulted in advanced properties of the nanocomposite coatings compared to magnetic stirring. The particle content in the coatings increased to similar to 5 wt% when ultrasounds were applied and ceria sol used as a source of particles. Presence of ceria in composite coatings offered favourable action in corrosion behaviour increasing barrier properties of composite coatings, thereby providing a prolonged lifetime of Zn-Co alloy coatings. The benefit was more pronounced in the case of ceria sol, and deposition at 20 W cm(-2), when values of impedance modulus at low frequencies reached four times higher values after 4 days exposure to 3 wt% NaCl solution than for coatings deposited with magnetic stirring for both ceria source. The lowest value of corrosion current density (2.15 mu A cm(-2)) was determined for Zn-Co-CeO2 (CeO2 sol) composite coatings deposited under 20 W cm(-2) US power.
T2  - Journal of Materials Research and Technology-JMR&T
T1  - The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings
EP  - 1349
SP  - 1336
VL  - 13
DO  - 10.1016/j.jmrt.2021.05.064
ER  - 
@article{
author = "Ridosic, Marija and Salicio-Paz, Asier and Garcia-Lecina, Eva and Zabinski, Piotr and Zivkovic, Ljiljana S. and Bajat, Jelena",
year = "2021",
abstract = "The goal of this research was to develop and analyse novel Zn-Co-CeO2 protective coatings on steel. Two different sources of ceria (CeO2) particles were employed: commercial powder and synthesized stable colloidal dispersion-sol. The plating solution was agitated by ultrasounds (20 and 30 W cm(-2)) or by magnetic stirrer (300 rpm) during electrodeposition. The CeO2 particles used were characterized by different methods, namely scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) to compare the morphology, crystallinity and particle size. The morphology of developed composite coatings was analysed by SEM, the preferred texture was calculated based on XRD results and corrosion behaviour was evaluated by electrochemical impedance spectroscopy (EIS) and polarization measurements. Utilizing ultrasounds during electrodeposition resulted in advanced properties of the nanocomposite coatings compared to magnetic stirring. The particle content in the coatings increased to similar to 5 wt% when ultrasounds were applied and ceria sol used as a source of particles. Presence of ceria in composite coatings offered favourable action in corrosion behaviour increasing barrier properties of composite coatings, thereby providing a prolonged lifetime of Zn-Co alloy coatings. The benefit was more pronounced in the case of ceria sol, and deposition at 20 W cm(-2), when values of impedance modulus at low frequencies reached four times higher values after 4 days exposure to 3 wt% NaCl solution than for coatings deposited with magnetic stirring for both ceria source. The lowest value of corrosion current density (2.15 mu A cm(-2)) was determined for Zn-Co-CeO2 (CeO2 sol) composite coatings deposited under 20 W cm(-2) US power.",
journal = "Journal of Materials Research and Technology-JMR&T",
title = "The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings",
pages = "1349-1336",
volume = "13",
doi = "10.1016/j.jmrt.2021.05.064"
}
Ridosic, M., Salicio-Paz, A., Garcia-Lecina, E., Zabinski, P., Zivkovic, L. S.,& Bajat, J.. (2021). The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings. in Journal of Materials Research and Technology-JMR&T, 13, 1336-1349.
https://doi.org/10.1016/j.jmrt.2021.05.064
Ridosic M, Salicio-Paz A, Garcia-Lecina E, Zabinski P, Zivkovic LS, Bajat J. The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings. in Journal of Materials Research and Technology-JMR&T. 2021;13:1336-1349.
doi:10.1016/j.jmrt.2021.05.064 .
Ridosic, Marija, Salicio-Paz, Asier, Garcia-Lecina, Eva, Zabinski, Piotr, Zivkovic, Ljiljana S., Bajat, Jelena, "The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings" in Journal of Materials Research and Technology-JMR&T, 13 (2021):1336-1349,
https://doi.org/10.1016/j.jmrt.2021.05.064 . .
3
6

Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration

Krstajić Pajić, Mila N.; Stevanović, Sanja I.; Radmilović, Vuk V.; Zabinski, Piotr; Elezović, Nevenka R.; Radmilović, Velimir R.; Gojković, Snežana Lj.; Jovanović, Vladislava M.

(International Association of Physical Chemists, 2019)

TY  - CONF
AU  - Krstajić Pajić, Mila N.
AU  - Stevanović, Sanja I.
AU  - Radmilović, Vuk V.
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7311
AB  - Formic acid is one of the most promising small organic molecules that can be used as fuel in polymer
electrolyte fuel cells. These systems are recognized as high-efficiency energy conversion devices which could
offer energy generated from electrochemical processes. At carbon supported platinum nanoparticles as state
of the art anodic catalysts formic acid oxidation reaction (FAOR) proceeds through a dual path mechanism
that includes the formation of CO in the indirect reaction pathway. Since CO is a catalytic poison, the best
way to address this problem is to synthesize catalysts that would either provide prompt CO oxidation and
removal, or favour the direct reaction pathway to completely avoid CO formation and electrode poisoning.
PtAu systems are considered as efficient catalysts for FAOR due to the ensemble effect of Au on Pt, however
the optimal ratio of these two elements is still quite vague. Given the experience with water in oil
microemulsion synthesis for preparation of shape controlled Pt nanoparticles,1 bimetallic PtAu/C
nanocatalysts were synthesized by the same procedure, following a simultaneous precursor reduction
methodology.2 The amount of the capping agent used, was varied in order to cause formation of
nanoparticles with different shape (cubic or tetrahedron like). Addition of a very low, but very finely dispersed
amount of Au significantly increases the catalytic activity, and also affects kinetic of the particle growth,
influencing the particle shape. Ordered structure of these particles contributes to their stability as well. These
results were obtained by Electrochemical and High Resolution Transmission Electron Microscopy
characterization (HRTEM) with Energy Dispersive X-ray Spectroscopy (EDXS), along with X-Ray Diffraction and
(XRD) and X-Ray Photoelectron Spectroscopy (XPS).
PB  - International Association of Physical Chemists
C3  - Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019
T1  - Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration
SP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7311
ER  - 
@conference{
author = "Krstajić Pajić, Mila N. and Stevanović, Sanja I. and Radmilović, Vuk V. and Zabinski, Piotr and Elezović, Nevenka R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2019",
abstract = "Formic acid is one of the most promising small organic molecules that can be used as fuel in polymer
electrolyte fuel cells. These systems are recognized as high-efficiency energy conversion devices which could
offer energy generated from electrochemical processes. At carbon supported platinum nanoparticles as state
of the art anodic catalysts formic acid oxidation reaction (FAOR) proceeds through a dual path mechanism
that includes the formation of CO in the indirect reaction pathway. Since CO is a catalytic poison, the best
way to address this problem is to synthesize catalysts that would either provide prompt CO oxidation and
removal, or favour the direct reaction pathway to completely avoid CO formation and electrode poisoning.
PtAu systems are considered as efficient catalysts for FAOR due to the ensemble effect of Au on Pt, however
the optimal ratio of these two elements is still quite vague. Given the experience with water in oil
microemulsion synthesis for preparation of shape controlled Pt nanoparticles,1 bimetallic PtAu/C
nanocatalysts were synthesized by the same procedure, following a simultaneous precursor reduction
methodology.2 The amount of the capping agent used, was varied in order to cause formation of
nanoparticles with different shape (cubic or tetrahedron like). Addition of a very low, but very finely dispersed
amount of Au significantly increases the catalytic activity, and also affects kinetic of the particle growth,
influencing the particle shape. Ordered structure of these particles contributes to their stability as well. These
results were obtained by Electrochemical and High Resolution Transmission Electron Microscopy
characterization (HRTEM) with Energy Dispersive X-ray Spectroscopy (EDXS), along with X-Ray Diffraction and
(XRD) and X-Ray Photoelectron Spectroscopy (XPS).",
publisher = "International Association of Physical Chemists",
journal = "Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019",
title = "Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration",
pages = "119",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7311"
}
Krstajić Pajić, M. N., Stevanović, S. I., Radmilović, V. V., Zabinski, P., Elezović, N. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2019). Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration. in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019
International Association of Physical Chemists., 119.
https://hdl.handle.net/21.15107/rcub_technorep_7311
Krstajić Pajić MN, Stevanović SI, Radmilović VV, Zabinski P, Elezović NR, Radmilović VR, Gojković SL, Jovanović VM. Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration. in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019. 2019;:119.
https://hdl.handle.net/21.15107/rcub_technorep_7311 .
Krstajić Pajić, Mila N., Stevanović, Sanja I., Radmilović, Vuk V., Zabinski, Piotr, Elezović, Nevenka R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Catalysis at nano level: Promoting Pt nanoparticle activity by Au decoration" in Book of Abstracts / 7th Regional Symposium on Electrochemistry – South East Europe & 8th Kurt Schwabe Symposium, Split, Croatia, May 27-30, 2019 (2019):119,
https://hdl.handle.net/21.15107/rcub_technorep_7311 .

Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method

Krstajić-Pajić, Mila; Stevanović, Sanja; Radmilović, Vuk; Gavrilović-Wohlmuther, Aleksandra; Zabinski, Piotr; Elezović, Nevenka R.; Radmilović, Velimir R.; Gojković, Snežana Lj.; Jovanović, Vladislava M.

(Elsevier Science Bv, Amsterdam, 2019)

TY  - JOUR
AU  - Krstajić-Pajić, Mila
AU  - Stevanović, Sanja
AU  - Radmilović, Vuk
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Zabinski, Piotr
AU  - Elezović, Nevenka R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
AU  - Jovanović, Vladislava M.
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4330
AB  - Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Catalysis B-Environmental
T1  - Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method
EP  - 593
SP  - 585
VL  - 243
DO  - 10.1016/j.apcatb.2018.10.064
ER  - 
@article{
author = "Krstajić-Pajić, Mila and Stevanović, Sanja and Radmilović, Vuk and Gavrilović-Wohlmuther, Aleksandra and Zabinski, Piotr and Elezović, Nevenka R. and Radmilović, Velimir R. and Gojković, Snežana Lj. and Jovanović, Vladislava M.",
year = "2019",
abstract = "Low loading PtAu nanoparticles supported on high area carbon were synthesized by water-in-oil microemulsion method and examined for formic acid and methanol oxidation. Prepared catalyst powder was characterized by Xray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). These techniques revealed that the catalyst contains rather agglomerated quasi-spherical particles, similar to 4 nm diameter, composed of a solid solution of Pt and Au with only similar to 4 at% of Au. In spite of such low Au content, both onset and peak potentials for CO oxidation are shifted some 150 mV to more positive values in comparison to Pt synthesized in the same manner due to stronger binding of CO as a result of notable electronic effect. It is important that this small quantity of Au also significantly influences oxidation of formic acid promoting direct path and suppressing indirect path in formic acid oxidation in a degree as expected by a much larger quantity of Au. Such improvement could be due exclusively by ensemble effect of high number of small Pt domains which formation could be possible only by very fine dispersion of such low Au quantity. High number of small Pt domains is corroborated by lower activity for methanol oxidation in comparison to Pt catalyst synthesized by the same procedure. These results emphasize the importance of the Au dispersion on the surface of Pt over its quantity in PtAu catalyst with regards to both, the ensemble and the electronic effects.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Catalysis B-Environmental",
title = "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method",
pages = "593-585",
volume = "243",
doi = "10.1016/j.apcatb.2018.10.064"
}
Krstajić-Pajić, M., Stevanović, S., Radmilović, V., Gavrilović-Wohlmuther, A., Zabinski, P., Elezović, N. R., Radmilović, V. R., Gojković, S. Lj.,& Jovanović, V. M.. (2019). Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental
Elsevier Science Bv, Amsterdam., 243, 585-593.
https://doi.org/10.1016/j.apcatb.2018.10.064
Krstajić-Pajić M, Stevanović S, Radmilović V, Gavrilović-Wohlmuther A, Zabinski P, Elezović NR, Radmilović VR, Gojković SL, Jovanović VM. Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method. in Applied Catalysis B-Environmental. 2019;243:585-593.
doi:10.1016/j.apcatb.2018.10.064 .
Krstajić-Pajić, Mila, Stevanović, Sanja, Radmilović, Vuk, Gavrilović-Wohlmuther, Aleksandra, Zabinski, Piotr, Elezović, Nevenka R., Radmilović, Velimir R., Gojković, Snežana Lj., Jovanović, Vladislava M., "Dispersion effect in formic acid oxidation on PtAu/C nanocatalyst prepared by water-in-oil microemulsion method" in Applied Catalysis B-Environmental, 243 (2019):585-593,
https://doi.org/10.1016/j.apcatb.2018.10.064 . .
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