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Activity of a PtBi alloy in the electrochemical oxidation of formic acid

Само за регистроване кориснике
2006
Аутори
Tripković, Amalija
Popović, Ksenija
Stevanović, Rade M.
Socha, R.
Kowal, Andrzej
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документу
Апстракт
Formic acid oxidation in acid solution was examined on a PtBi alloy characterized by X-ray photoelectron spectroscopy. Three chemical states of Bi, i.e., PtBi or Bi(0), Bi2O3 and BiO(OH) were found. Electrochemical characterization revealed that PtBi follows the behavior of its constituents, as well as that Bi is not stable in the PtBi alloy. It was established that the activity of PtBi is highly dependent of the reduction/oxidation of Bi species. Oxidation of formic acid does not occur on Bi covered PtBi. Rotated PtBi showed impressive activity relative to polycrystalline Pt, with the onset potential shifted by 0.25 V towards more negative potentials, and attained steady state current densities at 0.05 V, higher by two and half orders of magnitude. The activity of PtBi is caused by UPD phenomena of Bi on Pt, which was electrochemically detected. In addition, based on XPS analysis, it is proposed that the activity of PtBi could also be caused by the bifunctional action of hydroxylated ...Bi species.

Кључне речи:
Formic acid / Electrochemical oxidation / Pt–Bi alloy / Bi UPD / XPS characterization / Fuel cells
Извор:
Electrochemistry Communication, 2006, 8, 9, 1492-1498
Издавач:
  • Elsevier
Финансирање / пројекти:
  • Нови материјали за примену у горивим спреговима са полимерном мембраном (RS-142056)

DOI: 10.1016/j.elecom.2006.07.005

ISSN: 1388-2481

WoS: 000240796300015

Scopus: 2-s2.0-33748446082
[ Google Scholar ]
124
106
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/2879
Колекције
  • Radovi istraživača / Researchers' publications
Институција/група
IHTM
TY  - JOUR
AU  - Tripković, Amalija
AU  - Popović, Ksenija
AU  - Stevanović, Rade M.
AU  - Socha, R.
AU  - Kowal, Andrzej
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2879
AB  - Formic acid oxidation in acid solution was examined on a PtBi alloy characterized by X-ray photoelectron spectroscopy. Three chemical states of Bi, i.e., PtBi or Bi(0), Bi2O3 and BiO(OH) were found. Electrochemical characterization revealed that PtBi follows the behavior of its constituents, as well as that Bi is not stable in the PtBi alloy. It was established that the activity of PtBi is highly dependent of the reduction/oxidation of Bi species. Oxidation of formic acid does not occur on Bi covered PtBi. Rotated PtBi showed impressive activity relative to polycrystalline Pt, with the onset potential shifted by 0.25 V towards more negative potentials, and attained steady state current densities at 0.05 V, higher by two and half orders of magnitude. The activity of PtBi is caused by UPD phenomena of Bi on Pt, which was electrochemically detected. In addition, based on XPS analysis, it is proposed that the activity of PtBi could also be caused by the bifunctional action of hydroxylated Bi species.
PB  - Elsevier
T2  - Electrochemistry Communication
T1  - Activity of a PtBi alloy in the electrochemical oxidation of formic acid
VL  - 8
IS  - 9
SP  - 1492
EP  - 1498
DO  - 10.1016/j.elecom.2006.07.005
ER  - 
@article{
author = "Tripković, Amalija and Popović, Ksenija and Stevanović, Rade M. and Socha, R. and Kowal, Andrzej",
year = "2006",
abstract = "Formic acid oxidation in acid solution was examined on a PtBi alloy characterized by X-ray photoelectron spectroscopy. Three chemical states of Bi, i.e., PtBi or Bi(0), Bi2O3 and BiO(OH) were found. Electrochemical characterization revealed that PtBi follows the behavior of its constituents, as well as that Bi is not stable in the PtBi alloy. It was established that the activity of PtBi is highly dependent of the reduction/oxidation of Bi species. Oxidation of formic acid does not occur on Bi covered PtBi. Rotated PtBi showed impressive activity relative to polycrystalline Pt, with the onset potential shifted by 0.25 V towards more negative potentials, and attained steady state current densities at 0.05 V, higher by two and half orders of magnitude. The activity of PtBi is caused by UPD phenomena of Bi on Pt, which was electrochemically detected. In addition, based on XPS analysis, it is proposed that the activity of PtBi could also be caused by the bifunctional action of hydroxylated Bi species.",
publisher = "Elsevier",
journal = "Electrochemistry Communication",
title = "Activity of a PtBi alloy in the electrochemical oxidation of formic acid",
volume = "8",
number = "9",
pages = "1492-1498",
doi = "10.1016/j.elecom.2006.07.005"
}
Tripković, A., Popović, K., Stevanović, R. M., Socha, R.,& Kowal, A.. (2006). Activity of a PtBi alloy in the electrochemical oxidation of formic acid. in Electrochemistry Communication
Elsevier., 8(9), 1492-1498.
https://doi.org/10.1016/j.elecom.2006.07.005
Tripković A, Popović K, Stevanović RM, Socha R, Kowal A. Activity of a PtBi alloy in the electrochemical oxidation of formic acid. in Electrochemistry Communication. 2006;8(9):1492-1498.
doi:10.1016/j.elecom.2006.07.005 .
Tripković, Amalija, Popović, Ksenija, Stevanović, Rade M., Socha, R., Kowal, Andrzej, "Activity of a PtBi alloy in the electrochemical oxidation of formic acid" in Electrochemistry Communication, 8, no. 9 (2006):1492-1498,
https://doi.org/10.1016/j.elecom.2006.07.005 . .

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