Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction
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2018
Authors
Lović, J. D.Elezović, Nevenka

Jović, Borka
Zabinski, Piotr

Gajić-Krstajić, Ljiljana

Jović, Vladimir
Article (Published version)

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The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (−0.178 mA cm−2 and -0.415 mA cm−2 respectively) to the charge of −0.2 C cm−2 (thickness ∼ 0.18 μm) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of −3.0 C cm−2 (thickness ∼ 2.8 μm) at a constant current density of −7.0 mA cm−2 under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most... active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag – 27.4 at.% Pd and 84.7 at.% Ag – 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag – hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR. © 2018 Hydrogen Energy Publications LLC
Keywords:
AgPd coatings / electrodeposition / ethanol oxidation / non-reduced Ag2OSource:
International Journal of Hydrogen Energy, 2018, 43, 39, 18498-18508Publisher:
- Elsevier
Funding / projects:
- Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis (RS-172054)
- New approach in designing materials for energy conversion and energy storage systems (RS-172060)
- COST Action MP1407 - Electrochemical processing methodologies and corrosion protection for device and systems miniaturization (e-MINDS)
Note:
- Supporting information: https://hdl.handle.net/21.15107/rcub_dais_4082
Related info:
- Referenced by
https://hdl.handle.net/21.15107/rcub_dais_4082
DOI: 10.1016/j.ijhydene.2018.08.056
ISSN: 0360-3199
WoS: 000446949400043
Scopus: 2-s2.0-85052806947
Institution/Community
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Lović, J. D. AU - Elezović, Nevenka AU - Jović, Borka AU - Zabinski, Piotr AU - Gajić-Krstajić, Ljiljana AU - Jović, Vladimir PY - 2018 UR - https://dais.sanu.ac.rs/123456789/4076 AB - The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (−0.178 mA cm−2 and -0.415 mA cm−2 respectively) to the charge of −0.2 C cm−2 (thickness ∼ 0.18 μm) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of −3.0 C cm−2 (thickness ∼ 2.8 μm) at a constant current density of −7.0 mA cm−2 under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag – 27.4 at.% Pd and 84.7 at.% Ag – 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag – hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR. © 2018 Hydrogen Energy Publications LLC PB - Elsevier T2 - International Journal of Hydrogen Energy T1 - Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction SP - 18498 EP - 18508 VL - 43 IS - 39 DO - 10.1016/j.ijhydene.2018.08.056 UR - https://hdl.handle.net/21.15107/rcub_dais_4076 ER -
@article{ author = "Lović, J. D. and Elezović, Nevenka and Jović, Borka and Zabinski, Piotr and Gajić-Krstajić, Ljiljana and Jović, Vladimir", year = "2018", abstract = "The Pd and three AgPd alloy layers (AgPd1, AgPd2 and AgPd3) were electrodeposited onto Au disc electrodes from the solution containing high concentration of chloride ions (>12 M). All coatings were investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), anodic linear sweep voltammetry (ALSV), while their surface composition was investigated by X-ray photoelectron spectroscopy (XPS). The AgPd1 and AgPd2 samples were electrodeposited at different constant current densities (−0.178 mA cm−2 and -0.415 mA cm−2 respectively) to the charge of −0.2 C cm−2 (thickness ∼ 0.18 μm) at a stationary disc electrode, while the sample AgPd3 was electrodeposited to the charge of −3.0 C cm−2 (thickness ∼ 2.8 μm) at a constant current density of −7.0 mA cm−2 under the conditions of convective diffusion. Samples AgPd1 and AgPd2 had similar morphologies of low roughness, while the morphology of AgPd3 was characterized by large crystals and higher roughness. The most active and the most poisoning tolerant coatings for ethanol oxidation reaction (EOR) are the AgPd3 and AgPd1 alloy samples, containing 72.6 at.% Ag – 27.4 at.% Pd and 84.7 at.% Ag – 15.2 at.% Pd respectively (XPS analysis). In this study, we demonstrated for the first time that the activity for the EOR at AgPd alloys was closely related to the amount of non-reduced Ag2O (most probably as Ag – hydroxide). Accordingly, all AgPd alloy samples had to be cycled in the potential region of Ag2O formation and reduction before the investigation of the EOR, in order to provide their catalytic activity towards the EOR. © 2018 Hydrogen Energy Publications LLC", publisher = "Elsevier", journal = "International Journal of Hydrogen Energy", title = "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction", pages = "18498-18508", volume = "43", number = "39", doi = "10.1016/j.ijhydene.2018.08.056", url = "https://hdl.handle.net/21.15107/rcub_dais_4076" }
Lović, J. D., Elezović, N., Jović, B., Zabinski, P., Gajić-Krstajić, L.,& Jović, V.. (2018). Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy Elsevier., 43(39), 18498-18508. https://doi.org/10.1016/j.ijhydene.2018.08.056 https://hdl.handle.net/21.15107/rcub_dais_4076
Lović JD, Elezović N, Jović B, Zabinski P, Gajić-Krstajić L, Jović V. Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction. in International Journal of Hydrogen Energy. 2018;43(39):18498-18508. doi:10.1016/j.ijhydene.2018.08.056 https://hdl.handle.net/21.15107/rcub_dais_4076 .
Lović, J. D., Elezović, Nevenka, Jović, Borka, Zabinski, Piotr, Gajić-Krstajić, Ljiljana, Jović, Vladimir, "Electrodeposited AgPd alloy coatings as efficient catalysts for the ethanol oxidation reaction" in International Journal of Hydrogen Energy, 43, no. 39 (2018):18498-18508, https://doi.org/10.1016/j.ijhydene.2018.08.056 ., https://hdl.handle.net/21.15107/rcub_dais_4076 .