TY  - JOUR
AU  - Gojgić, Jelena D.
AU  - Petričević, Aleksandar M.
AU  - Rauscher, Thomas
AU  - Bernäcker, Christian I.
AU  - Weißgärber, Thomas
AU  - Pavko, Luka
AU  - Vasilić, Rastko
AU  - Krstajić Pajić, Mila N.
AU  - Jović, Vladimir D.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6577
AB  - The hydrogen evolution reaction (HER) was investigated in 1.0 M KOH at 25 °C at Ni foams with different pore sizes (450–1200 µm), and at the Ni-Sn/Ni foam electrodes, where Ni-Sn alloys were electrodeposited from the pyrophosphate-glycine bath using controlled potential coulometry (CPC) technique. The cross-section analysis revealed that rough Ni-Sn alloy covers complete available inner and outer foam surface, while investigated coating composition varied from 62 to 80 at% Ni (20–38 at% Sn). Comparing the HER polarization curves, the overpotential at j = −200 mA cm−2 was 427 mV lower for Ni-Sn samples than for bare Ni foams, while Tafel slopes changed from − 120 mV dec−1 at bare Ni foams to − 50 mV dec−1 for Ni-Sn/Ni foam samples. The lowest overpotential at − 100 mA cm−2 achieved is as low as − 77 mV. These cathodes could be promising 3D materials for industrial water electrolysis in zero-gap membrane flow cells.
PB  - Elsevier B.V.
T2  - Applied Catalysis A: General
T1  - Hydrogen evolution at Ni foam electrodes and Ni-Sn coated Ni foam electrodes
SP  - 119312
VL  - 663
DO  - 10.1016/j.apcata.2023.119312
ER  - 

@article{
author = "Gojgić, Jelena D. and Petričević, Aleksandar M. and Rauscher, Thomas and Bernäcker, Christian I. and Weißgärber, Thomas and Pavko, Luka and Vasilić, Rastko and Krstajić Pajić, Mila N. and Jović, Vladimir D.",
year = "2023",
abstract = "The hydrogen evolution reaction (HER) was investigated in 1.0 M KOH at 25 °C at Ni foams with different pore sizes (450–1200 µm), and at the Ni-Sn/Ni foam electrodes, where Ni-Sn alloys were electrodeposited from the pyrophosphate-glycine bath using controlled potential coulometry (CPC) technique. The cross-section analysis revealed that rough Ni-Sn alloy covers complete available inner and outer foam surface, while investigated coating composition varied from 62 to 80 at% Ni (20–38 at% Sn). Comparing the HER polarization curves, the overpotential at j = −200 mA cm−2 was 427 mV lower for Ni-Sn samples than for bare Ni foams, while Tafel slopes changed from − 120 mV dec−1 at bare Ni foams to − 50 mV dec−1 for Ni-Sn/Ni foam samples. The lowest overpotential at − 100 mA cm−2 achieved is as low as − 77 mV. These cathodes could be promising 3D materials for industrial water electrolysis in zero-gap membrane flow cells.",
publisher = "Elsevier B.V.",
journal = "Applied Catalysis A: General",
title = "Hydrogen evolution at Ni foam electrodes and Ni-Sn coated Ni foam electrodes",
pages = "119312",
volume = "663",
doi = "10.1016/j.apcata.2023.119312"
}

Gojgić, J. D., Petričević, A. M., Rauscher, T., Bernäcker, C. I., Weißgärber, T., Pavko, L., Vasilić, R., Krstajić Pajić, M. N.,& Jović, V. D.. (2023). Hydrogen evolution at Ni foam electrodes and Ni-Sn coated Ni foam electrodes. in Applied Catalysis A: General
Elsevier B.V.., 663, 119312.
https://doi.org/10.1016/j.apcata.2023.119312

Gojgić JD, Petričević AM, Rauscher T, Bernäcker CI, Weißgärber T, Pavko L, Vasilić R, Krstajić Pajić MN, Jović VD. Hydrogen evolution at Ni foam electrodes and Ni-Sn coated Ni foam electrodes. in Applied Catalysis A: General. 2023;663:119312.
doi:10.1016/j.apcata.2023.119312 .

Gojgić, Jelena D., Petričević, Aleksandar M., Rauscher, Thomas, Bernäcker, Christian I., Weißgärber, Thomas, Pavko, Luka, Vasilić, Rastko, Krstajić Pajić, Mila N., Jović, Vladimir D., "Hydrogen evolution at Ni foam electrodes and Ni-Sn coated Ni foam electrodes" in Applied Catalysis A: General, 663 (2023):119312,
https://doi.org/10.1016/j.apcata.2023.119312 . .

TY  - JOUR
AU  - Mladenović, Ivana
AU  - Lamovec, Jelena
AU  - Vasiljević-Radović, Dana
AU  - Vasilić, Rastko
AU  - Radojević, Vesna
AU  - Nikolić, Nebojša
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4539
AB  - Copper electrodeposition on (111)-oriented Si substrate was performed by the pulsating current (PC) regime at various average current densities in the range of 15-70 mAcm(-2), obtained by varying either the frequency (30, 50, 80 and 100 Hz for the current density amplitude of 100 mAcm(-2)) or the current density amplitude (120 and 140 mAcm(-2) at 100 Hz). The produced Cu coatings were examined by SEM, AFM and XRD techniques. The morphology of the coatings changed from those with large grains to fine-grained and globular, while the crystal structure changed from the strong (220) to the strong (111) preferred orientation by increasing the average current density. The mechanical characteristics of coatings were examined using Vickers micro-indentation tests, applying the Chicot-Lesage (C-L) composite hardness model for the analysis of microhardness. The maximum microhardness was obtained for the Cu coating produced at an average current density of 50 mAcm(-2), with a current density amplitude of 100 mAcm(-2) and a frequency of 100 Hz. This copper coating was fine-grained and showed the smallest roughness in relation to the other coatings, and it was obtained in the mixed activation-diffusion control between the end of the effect of the activation control and the beginning of the dominant effect of diffusion control.
PB  - MDPI, Basel
T2  - Metals
T1  - Morphology, Structure and Mechanical Properties of Copper Coatings Electrodeposited by Pulsating Current (PC) Regime on Si(111)
IS  - 4
VL  - 10
DO  - 10.3390/met10040488
ER  - 

@article{
author = "Mladenović, Ivana and Lamovec, Jelena and Vasiljević-Radović, Dana and Vasilić, Rastko and Radojević, Vesna and Nikolić, Nebojša",
year = "2020",
abstract = "Copper electrodeposition on (111)-oriented Si substrate was performed by the pulsating current (PC) regime at various average current densities in the range of 15-70 mAcm(-2), obtained by varying either the frequency (30, 50, 80 and 100 Hz for the current density amplitude of 100 mAcm(-2)) or the current density amplitude (120 and 140 mAcm(-2) at 100 Hz). The produced Cu coatings were examined by SEM, AFM and XRD techniques. The morphology of the coatings changed from those with large grains to fine-grained and globular, while the crystal structure changed from the strong (220) to the strong (111) preferred orientation by increasing the average current density. The mechanical characteristics of coatings were examined using Vickers micro-indentation tests, applying the Chicot-Lesage (C-L) composite hardness model for the analysis of microhardness. The maximum microhardness was obtained for the Cu coating produced at an average current density of 50 mAcm(-2), with a current density amplitude of 100 mAcm(-2) and a frequency of 100 Hz. This copper coating was fine-grained and showed the smallest roughness in relation to the other coatings, and it was obtained in the mixed activation-diffusion control between the end of the effect of the activation control and the beginning of the dominant effect of diffusion control.",
publisher = "MDPI, Basel",
journal = "Metals",
title = "Morphology, Structure and Mechanical Properties of Copper Coatings Electrodeposited by Pulsating Current (PC) Regime on Si(111)",
number = "4",
volume = "10",
doi = "10.3390/met10040488"
}

Mladenović, I., Lamovec, J., Vasiljević-Radović, D., Vasilić, R., Radojević, V.,& Nikolić, N.. (2020). Morphology, Structure and Mechanical Properties of Copper Coatings Electrodeposited by Pulsating Current (PC) Regime on Si(111). in Metals
MDPI, Basel., 10(4).
https://doi.org/10.3390/met10040488

Mladenović I, Lamovec J, Vasiljević-Radović D, Vasilić R, Radojević V, Nikolić N. Morphology, Structure and Mechanical Properties of Copper Coatings Electrodeposited by Pulsating Current (PC) Regime on Si(111). in Metals. 2020;10(4).
doi:10.3390/met10040488 .

Mladenović, Ivana, Lamovec, Jelena, Vasiljević-Radović, Dana, Vasilić, Rastko, Radojević, Vesna, Nikolić, Nebojša, "Morphology, Structure and Mechanical Properties of Copper Coatings Electrodeposited by Pulsating Current (PC) Regime on Si(111)" in Metals, 10, no. 4 (2020),
https://doi.org/10.3390/met10040488 . .

TY  - JOUR
AU  - Bajat, Jelena
AU  - Mišković-Stanković, Vesna
AU  - Vasilić, Rastko
AU  - Stojadinović, Stevan
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2558
AB  - The plasma electrolytic oxidation (PEO) of aluminum in sodium tungstate (Na2WO4 center dot 2H(2)O) and Na2WO4 center dot 2H(2)O doped with Zr was analyzed in order to obtain oxide coatings with improved corrosion resistance. The influence of current density in PEO process and anodization time was investigated, as well as the influence of Zr, with the aim to find out how they affect the chemical content, morphology, surface roughness, and corrosion stability of oxide coatings. It was shown that the presence of Zr increases the corrosion stability of oxide coatings for all investigated PEO times. Evolution of EIS spectra during the exposure to 3% NaCl, as a strong corrosive agent, indicated the highest corrosion stability for PEO coating formed on aluminum at 70 mA/cm(2) for 2 min in a zirconium containing electrolyte.
PB  - Slovenian Chemical Society
T2  - Acta Chimica Slovenica
T1  - Corrosion Evaluation of Zirconium Doped Oxide Coatings on Aluminum Formed by Plasma Electrolytic Oxidation
EP  - 315
IS  - 2
SP  - 308
VL  - 61
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2558
ER  - 

@article{
author = "Bajat, Jelena and Mišković-Stanković, Vesna and Vasilić, Rastko and Stojadinović, Stevan",
year = "2014",
abstract = "The plasma electrolytic oxidation (PEO) of aluminum in sodium tungstate (Na2WO4 center dot 2H(2)O) and Na2WO4 center dot 2H(2)O doped with Zr was analyzed in order to obtain oxide coatings with improved corrosion resistance. The influence of current density in PEO process and anodization time was investigated, as well as the influence of Zr, with the aim to find out how they affect the chemical content, morphology, surface roughness, and corrosion stability of oxide coatings. It was shown that the presence of Zr increases the corrosion stability of oxide coatings for all investigated PEO times. Evolution of EIS spectra during the exposure to 3% NaCl, as a strong corrosive agent, indicated the highest corrosion stability for PEO coating formed on aluminum at 70 mA/cm(2) for 2 min in a zirconium containing electrolyte.",
publisher = "Slovenian Chemical Society",
journal = "Acta Chimica Slovenica",
title = "Corrosion Evaluation of Zirconium Doped Oxide Coatings on Aluminum Formed by Plasma Electrolytic Oxidation",
pages = "315-308",
number = "2",
volume = "61",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2558"
}

Bajat, J., Mišković-Stanković, V., Vasilić, R.,& Stojadinović, S.. (2014). Corrosion Evaluation of Zirconium Doped Oxide Coatings on Aluminum Formed by Plasma Electrolytic Oxidation. in Acta Chimica Slovenica
Slovenian Chemical Society., 61(2), 308-315.
https://hdl.handle.net/21.15107/rcub_technorep_2558

Bajat J, Mišković-Stanković V, Vasilić R, Stojadinović S. Corrosion Evaluation of Zirconium Doped Oxide Coatings on Aluminum Formed by Plasma Electrolytic Oxidation. in Acta Chimica Slovenica. 2014;61(2):308-315.
https://hdl.handle.net/21.15107/rcub_technorep_2558 .

Bajat, Jelena, Mišković-Stanković, Vesna, Vasilić, Rastko, Stojadinović, Stevan, "Corrosion Evaluation of Zirconium Doped Oxide Coatings on Aluminum Formed by Plasma Electrolytic Oxidation" in Acta Chimica Slovenica, 61, no. 2 (2014):308-315,
https://hdl.handle.net/21.15107/rcub_technorep_2558 .

TY  - JOUR
AU  - Bajat, Jelena
AU  - Vasilić, Rastko
AU  - Stojadinović, S.
AU  - Mišković-Stanković, Vesna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2400
AB  - Electrochemical properties of oxide coatings formed by plasma electrolytic oxidation (PEO) on aluminum in sodium tungstate (Na2WO4 center dot 2H(2)O) with respect to process time were investigated using electrochemical impedance spectroscopy (EIS). Presence of tungsten was beneficial for the corrosion stability of obtained oxide coatings. However, neither the amount of tungsten in the oxide coating nor the coatings thickness were identified as important factors in corrosion stability of PEO coatings, i.e., morphology and porosity solely govern the corrosion stability of PEO coatings. The evolution of EIS spectra with immersion time for coatings anodized for 5 min and 7.5 min point to more efficient corrosion protection of aluminum substrate, compared to other tested samples.
PB  - Natl Assoc Corrosion Eng, Houston
T2  - Corrosion
T1  - Corrosion Stability of Oxide Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Optimization of Process Time
EP  - 702
IS  - 7
SP  - 693
VL  - 69
DO  - 10.5006/0859
ER  - 

@article{
author = "Bajat, Jelena and Vasilić, Rastko and Stojadinović, S. and Mišković-Stanković, Vesna",
year = "2013",
abstract = "Electrochemical properties of oxide coatings formed by plasma electrolytic oxidation (PEO) on aluminum in sodium tungstate (Na2WO4 center dot 2H(2)O) with respect to process time were investigated using electrochemical impedance spectroscopy (EIS). Presence of tungsten was beneficial for the corrosion stability of obtained oxide coatings. However, neither the amount of tungsten in the oxide coating nor the coatings thickness were identified as important factors in corrosion stability of PEO coatings, i.e., morphology and porosity solely govern the corrosion stability of PEO coatings. The evolution of EIS spectra with immersion time for coatings anodized for 5 min and 7.5 min point to more efficient corrosion protection of aluminum substrate, compared to other tested samples.",
publisher = "Natl Assoc Corrosion Eng, Houston",
journal = "Corrosion",
title = "Corrosion Stability of Oxide Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Optimization of Process Time",
pages = "702-693",
number = "7",
volume = "69",
doi = "10.5006/0859"
}

Bajat, J., Vasilić, R., Stojadinović, S.,& Mišković-Stanković, V.. (2013). Corrosion Stability of Oxide Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Optimization of Process Time. in Corrosion
Natl Assoc Corrosion Eng, Houston., 69(7), 693-702.
https://doi.org/10.5006/0859

Bajat J, Vasilić R, Stojadinović S, Mišković-Stanković V. Corrosion Stability of Oxide Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Optimization of Process Time. in Corrosion. 2013;69(7):693-702.
doi:10.5006/0859 .

Bajat, Jelena, Vasilić, Rastko, Stojadinović, S., Mišković-Stanković, Vesna, "Corrosion Stability of Oxide Coatings Formed by Plasma Electrolytic Oxidation of Aluminum: Optimization of Process Time" in Corrosion, 69, no. 7 (2013):693-702,
https://doi.org/10.5006/0859 . .

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Bajat, Jelena
AU  - Vasilić, Rastko
AU  - Mišković-Stanković, Vesna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2304
AB  - This paper presents our recent research on morphology and phase composition of oxide coatings formed by plasma electrolytic oxidation of aluminum in 0.1 M sodium tungstate at constant current density of 15 mA/cm2 and corrosion stability of such coatings. Roughness of obtained oxide coatings increases with prolonged process time, while their microhardness reaches maximal value after about 5 minutes from the onset of the process and then decreases. Oxide coatings are partly crystallized and mainly consist of γ-Al2O3, α-Al2O3 i WO3, with γ-Al2O3 content increasing with prolonged PEO time. All obtained oxide coatings have higher impedance than pure aluminum and no relationship between PEO time and impedance is found. The evolution of impedance spectra shows that samples obtained after 7.5 minutes of PEO time have most efficient corrosion protection of aluminum substrate.
AB  - U radu su prikazana ispitivanja morfologije i faznog sastava površina oksidnih slojeva dobijenih metodom plazma elektrolitičke oksidacije aluminijuma u 0.1 M vodenom rastvoru natrijum volframatu pri stalnoj gustini struje od 15 mA/cm2, kao i njihova koroziona stabilnost. Pokazano je da hrapavost dobijenih slojeva raste sa vremenom trajanja procesa, dok mikro tvrdoća uzoraka dostiže maksimalnu vrednost posle 5 minuta od početka procesa i posle tog vremena opada. Osidni slojevi su delimično kristalizovane i uglavnom se sastoje od γ-Al2O3, α-Al2O3 i WO3, a sadržaj γ-Al2O3 raste sa trajanjem PEO procesa. Dobijeni oksidni slojevi imaju veću impedansu od čistog aluminijuma, pri čemu dužem vremenu PEO procesa ne odgovara i najveća impedansa. Najveću korozionu stabilnost su pokazali oksidni slojevi dobijeni posle 7.5 minuta odpočetka anodizacije.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Characterization of oxide coatings formed by plasma electrolytic oxidation of aluminum in sodium tungstate
T1  - Karakterizacija oksidnih slojeva dobijenih plazma elektrolitičkom oksidacijom aluminijuma u natrijum volframatu
EP  - 152
IS  - 2
SP  - 147
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2304
ER  - 

@article{
author = "Stojadinović, Stevan and Bajat, Jelena and Vasilić, Rastko and Mišković-Stanković, Vesna",
year = "2013",
abstract = "This paper presents our recent research on morphology and phase composition of oxide coatings formed by plasma electrolytic oxidation of aluminum in 0.1 M sodium tungstate at constant current density of 15 mA/cm2 and corrosion stability of such coatings. Roughness of obtained oxide coatings increases with prolonged process time, while their microhardness reaches maximal value after about 5 minutes from the onset of the process and then decreases. Oxide coatings are partly crystallized and mainly consist of γ-Al2O3, α-Al2O3 i WO3, with γ-Al2O3 content increasing with prolonged PEO time. All obtained oxide coatings have higher impedance than pure aluminum and no relationship between PEO time and impedance is found. The evolution of impedance spectra shows that samples obtained after 7.5 minutes of PEO time have most efficient corrosion protection of aluminum substrate., U radu su prikazana ispitivanja morfologije i faznog sastava površina oksidnih slojeva dobijenih metodom plazma elektrolitičke oksidacije aluminijuma u 0.1 M vodenom rastvoru natrijum volframatu pri stalnoj gustini struje od 15 mA/cm2, kao i njihova koroziona stabilnost. Pokazano je da hrapavost dobijenih slojeva raste sa vremenom trajanja procesa, dok mikro tvrdoća uzoraka dostiže maksimalnu vrednost posle 5 minuta od početka procesa i posle tog vremena opada. Osidni slojevi su delimično kristalizovane i uglavnom se sastoje od γ-Al2O3, α-Al2O3 i WO3, a sadržaj γ-Al2O3 raste sa trajanjem PEO procesa. Dobijeni oksidni slojevi imaju veću impedansu od čistog aluminijuma, pri čemu dužem vremenu PEO procesa ne odgovara i najveća impedansa. Najveću korozionu stabilnost su pokazali oksidni slojevi dobijeni posle 7.5 minuta odpočetka anodizacije.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Characterization of oxide coatings formed by plasma electrolytic oxidation of aluminum in sodium tungstate, Karakterizacija oksidnih slojeva dobijenih plazma elektrolitičkom oksidacijom aluminijuma u natrijum volframatu",
pages = "152-147",
number = "2",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2304"
}

Stojadinović, S., Bajat, J., Vasilić, R.,& Mišković-Stanković, V.. (2013). Characterization of oxide coatings formed by plasma electrolytic oxidation of aluminum in sodium tungstate. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 54(2), 147-152.
https://hdl.handle.net/21.15107/rcub_technorep_2304

Stojadinović S, Bajat J, Vasilić R, Mišković-Stanković V. Characterization of oxide coatings formed by plasma electrolytic oxidation of aluminum in sodium tungstate. in Zaštita materijala. 2013;54(2):147-152.
https://hdl.handle.net/21.15107/rcub_technorep_2304 .

Stojadinović, Stevan, Bajat, Jelena, Vasilić, Rastko, Mišković-Stanković, Vesna, "Characterization of oxide coatings formed by plasma electrolytic oxidation of aluminum in sodium tungstate" in Zaštita materijala, 54, no. 2 (2013):147-152,
https://hdl.handle.net/21.15107/rcub_technorep_2304 .