TY  - JOUR
AU  - Kutyła, Dawid
AU  - Krstajić Pajić, Mila N.
AU  - Lačnjevac, Uroš Č.
AU  - Marzec, Mateusz M.
AU  - Elezović, Nevenka R.
AU  - Żabiński, Piotr
PY  - 2024-02
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6992
AB  - This study investigates the structure, electrochemical behavior and hydrogen evolution reaction (HER) performance of electrodeposited Ru–Co alloy coatings. The alloys were prepared from a 0.75 M Co2+ + 0.025 M Ru3+ solution at various potentials ranging from −0.5 to −1.2 V vs. SCE. Results reveal that the Ru and Co deposition processes are interdependent. The deposition of nobler Ru from the mixed metal solution reaches pure diffusion control already at −0.7 V compared to −1.0 V from a single Ru bath. On the other hand, Co deposition is significantly facilitated in the presence of Ru in the solution. Consequently, as the deposition potential changes from −0.6 to −1.0 V, Ru–Co solid solution coatings characterized by a distinct globular morphology are formed, with their Co content increasing from 22.1/7.4 to 70.2/86.1 wt% for the Cu/Ti2AlC MAX phase substrate applied. The alloy catalysts are found to show much better HER activity and stability in alkaline than in acidic solutions. The best Ru–Co@Ti2AlC sample, electrodeposited at −0.6 V, requires an overpotential of only −95 mV to deliver a current density of −100 mA cm−2 in 1 M KOH, thus outperforming most Ru–Co-based HER electrocatalysts reported to date.
PB  - Elsevier Ltd.
T2  - International Journal of Hydrogen Energy
T1  - Ru–Co alloy coatings electrodeposited on a MAX phase substrate as efficient catalysts for the hydrogen evolution reaction
EP  - 40
SP  - 28
VL  - 56
DO  - 10.1016/j.ijhydene.2023.11.296
ER  - 

@article{
author = "Kutyła, Dawid and Krstajić Pajić, Mila N. and Lačnjevac, Uroš Č. and Marzec, Mateusz M. and Elezović, Nevenka R. and Żabiński, Piotr",
year = "2024-02",
abstract = "This study investigates the structure, electrochemical behavior and hydrogen evolution reaction (HER) performance of electrodeposited Ru–Co alloy coatings. The alloys were prepared from a 0.75 M Co2+ + 0.025 M Ru3+ solution at various potentials ranging from −0.5 to −1.2 V vs. SCE. Results reveal that the Ru and Co deposition processes are interdependent. The deposition of nobler Ru from the mixed metal solution reaches pure diffusion control already at −0.7 V compared to −1.0 V from a single Ru bath. On the other hand, Co deposition is significantly facilitated in the presence of Ru in the solution. Consequently, as the deposition potential changes from −0.6 to −1.0 V, Ru–Co solid solution coatings characterized by a distinct globular morphology are formed, with their Co content increasing from 22.1/7.4 to 70.2/86.1 wt% for the Cu/Ti2AlC MAX phase substrate applied. The alloy catalysts are found to show much better HER activity and stability in alkaline than in acidic solutions. The best Ru–Co@Ti2AlC sample, electrodeposited at −0.6 V, requires an overpotential of only −95 mV to deliver a current density of −100 mA cm−2 in 1 M KOH, thus outperforming most Ru–Co-based HER electrocatalysts reported to date.",
publisher = "Elsevier Ltd.",
journal = "International Journal of Hydrogen Energy",
title = "Ru–Co alloy coatings electrodeposited on a MAX phase substrate as efficient catalysts for the hydrogen evolution reaction",
pages = "40-28",
volume = "56",
doi = "10.1016/j.ijhydene.2023.11.296"
}

Kutyła, D., Krstajić Pajić, M. N., Lačnjevac, U. Č., Marzec, M. M., Elezović, N. R.,& Żabiński, P.. (2024-02). Ru–Co alloy coatings electrodeposited on a MAX phase substrate as efficient catalysts for the hydrogen evolution reaction. in International Journal of Hydrogen Energy
Elsevier Ltd.., 56, 28-40.
https://doi.org/10.1016/j.ijhydene.2023.11.296

Kutyła D, Krstajić Pajić MN, Lačnjevac UČ, Marzec MM, Elezović NR, Żabiński P. Ru–Co alloy coatings electrodeposited on a MAX phase substrate as efficient catalysts for the hydrogen evolution reaction. in International Journal of Hydrogen Energy. 2024;56:28-40.
doi:10.1016/j.ijhydene.2023.11.296 .

Kutyła, Dawid, Krstajić Pajić, Mila N., Lačnjevac, Uroš Č., Marzec, Mateusz M., Elezović, Nevenka R., Żabiński, Piotr, "Ru–Co alloy coatings electrodeposited on a MAX phase substrate as efficient catalysts for the hydrogen evolution reaction" in International Journal of Hydrogen Energy, 56 (2024-02):28-40,
https://doi.org/10.1016/j.ijhydene.2023.11.296 . .

TY  - JOUR
AU  - Obradović, Maja D.
AU  - Lačnjevac, Uroš Č.
AU  - Radmilović, Vuk V.
AU  - Gavrilović-Wohlmuther, Aleksandra
AU  - Kovač, Janez
AU  - Rogan, Jelena R.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6587
AB  - Two types of Cu-modified Pd catalysts supported on high area carbon were prepared: Pd nanoparticles modified with a sub-monolayer of underpotentially deposited Cu (Cu@Pd/C) and Pd-Cu alloy nanoparticles (Pd-Cu/C), and examined for the ethanol oxidation reaction (EOR) in alkaline solution. The catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, as well as cyclic voltammetry. As reference catalysts, Pd/C and Pt/C were used. The electrochemically active surface area of all samples was determined from COads and Cuupd desorption and Pd oxide reduction, and used to assess their intrinsic activity for EOR. Intimate contact of Pd with Cu atoms enhanced its activity, regardless of the type of bimetal catalyst. The atomic Pd:Cu ratio between 2:1 and 4:1 appears to be optimal for high activity. The most active catalyst under the potentiodynamic conditions was Cu@Pd/C with θ(Cu) = 0.21,although Pd-Cu/C was superior during the potentiostatic test. All bimetallic catalysts surpassed Pd/C in mass activity. The EOR activity of Pt/C was higher compared to Pd-based catalysts at low potentials, both in terms of specific and mass activity, but with a significant decline over a 30-min potentiostatic stability test.
PB  - Elsevier B.V.
T2  - Journal of Electroanalytical Chemistry
T1  - Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium
SP  - 117673
VL  - 944
DO  - 10.1016/j.jelechem.2023.117673
ER  - 

@article{
author = "Obradović, Maja D. and Lačnjevac, Uroš Č. and Radmilović, Vuk V. and Gavrilović-Wohlmuther, Aleksandra and Kovač, Janez and Rogan, Jelena R. and Radmilović, Velimir R. and Gojković, Snežana Lj.",
year = "2023",
abstract = "Two types of Cu-modified Pd catalysts supported on high area carbon were prepared: Pd nanoparticles modified with a sub-monolayer of underpotentially deposited Cu (Cu@Pd/C) and Pd-Cu alloy nanoparticles (Pd-Cu/C), and examined for the ethanol oxidation reaction (EOR) in alkaline solution. The catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy, as well as cyclic voltammetry. As reference catalysts, Pd/C and Pt/C were used. The electrochemically active surface area of all samples was determined from COads and Cuupd desorption and Pd oxide reduction, and used to assess their intrinsic activity for EOR. Intimate contact of Pd with Cu atoms enhanced its activity, regardless of the type of bimetal catalyst. The atomic Pd:Cu ratio between 2:1 and 4:1 appears to be optimal for high activity. The most active catalyst under the potentiodynamic conditions was Cu@Pd/C with θ(Cu) = 0.21,although Pd-Cu/C was superior during the potentiostatic test. All bimetallic catalysts surpassed Pd/C in mass activity. The EOR activity of Pt/C was higher compared to Pd-based catalysts at low potentials, both in terms of specific and mass activity, but with a significant decline over a 30-min potentiostatic stability test.",
publisher = "Elsevier B.V.",
journal = "Journal of Electroanalytical Chemistry",
title = "Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium",
pages = "117673",
volume = "944",
doi = "10.1016/j.jelechem.2023.117673"
}

Obradović, M. D., Lačnjevac, U. Č., Radmilović, V. V., Gavrilović-Wohlmuther, A., Kovač, J., Rogan, J. R., Radmilović, V. R.,& Gojković, S. Lj.. (2023). Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium. in Journal of Electroanalytical Chemistry
Elsevier B.V.., 944, 117673.
https://doi.org/10.1016/j.jelechem.2023.117673

Obradović MD, Lačnjevac UČ, Radmilović VV, Gavrilović-Wohlmuther A, Kovač J, Rogan JR, Radmilović VR, Gojković SL. Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium. in Journal of Electroanalytical Chemistry. 2023;944:117673.
doi:10.1016/j.jelechem.2023.117673 .

Obradović, Maja D., Lačnjevac, Uroš Č., Radmilović, Vuk V., Gavrilović-Wohlmuther, Aleksandra, Kovač, Janez, Rogan, Jelena R., Radmilović, Velimir R., Gojković, Snežana Lj., "Palladium-copper bimetallic surfaces as electrocatalysts for the ethanol oxidation in an alkaline medium" in Journal of Electroanalytical Chemistry, 944 (2023):117673,
https://doi.org/10.1016/j.jelechem.2023.117673 . .