High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation
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2012
Authors
Lović, JelenaObradović, Maja
Tripković, Dušan
Popović, Ksenija
Jovanović, Vladislava M.
Gojković, Snežana Lj.
Tripković, Amalija
Article (Published version)
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Formic acid oxidation was studied on a new prepared Pt2Bi characterized by X-ray diffraction spectroscopy (phase composition), scanning tunneling microscopy (STM) (surface morphology), and COads stripping voltammetry (surface composition). Bulk composition of Pt2Bi revealed two phases-55% PtBi alloy and 45% Pt. Estimated contribution of pure Pt on the Pt2Bi surface (43.5%) determined by COads stripping voltammetry corresponds closely to bulk composition. Pt2Bi reveals high activity and stability in formic acid oxidation. High activity originates from the fact that formic acid oxidation proceeds completely through dehydrogenation path based on an ensemble effect. The high stability of Pt2Bi surface is induced by the suppression of Bi leaching as it was evidenced by insignificant changes of surface morphology and surface roughness shown by STM images before and after electrochemical treatment in formic acid containing solution. Pt2Bi is found to be powerful catalyst exhibiting up to two ...orders of magnitude larger current densities at 0.0 V and onset potential shifted for similar to 0.2 V to more negative value relative to Pt under steady-state condition.
Keywords:
Formic acid / Electrochemical oxidation / Pt2Bi catalyst / Fuel cellSource:
Electrocatalysis, 2012, 3, 3-4, 346-352Publisher:
- Springer, New York
Funding / projects:
DOI: 10.1007/s12678-012-0099-9
ISSN: 1868-2529
WoS: 000312634100021
Scopus: 2-s2.0-84871343383
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Lović, Jelena AU - Obradović, Maja AU - Tripković, Dušan AU - Popović, Ksenija AU - Jovanović, Vladislava M. AU - Gojković, Snežana Lj. AU - Tripković, Amalija PY - 2012 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2148 AB - Formic acid oxidation was studied on a new prepared Pt2Bi characterized by X-ray diffraction spectroscopy (phase composition), scanning tunneling microscopy (STM) (surface morphology), and COads stripping voltammetry (surface composition). Bulk composition of Pt2Bi revealed two phases-55% PtBi alloy and 45% Pt. Estimated contribution of pure Pt on the Pt2Bi surface (43.5%) determined by COads stripping voltammetry corresponds closely to bulk composition. Pt2Bi reveals high activity and stability in formic acid oxidation. High activity originates from the fact that formic acid oxidation proceeds completely through dehydrogenation path based on an ensemble effect. The high stability of Pt2Bi surface is induced by the suppression of Bi leaching as it was evidenced by insignificant changes of surface morphology and surface roughness shown by STM images before and after electrochemical treatment in formic acid containing solution. Pt2Bi is found to be powerful catalyst exhibiting up to two orders of magnitude larger current densities at 0.0 V and onset potential shifted for similar to 0.2 V to more negative value relative to Pt under steady-state condition. PB - Springer, New York T2 - Electrocatalysis T1 - High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation EP - 352 IS - 3-4 SP - 346 VL - 3 DO - 10.1007/s12678-012-0099-9 ER -
@article{ author = "Lović, Jelena and Obradović, Maja and Tripković, Dušan and Popović, Ksenija and Jovanović, Vladislava M. and Gojković, Snežana Lj. and Tripković, Amalija", year = "2012", abstract = "Formic acid oxidation was studied on a new prepared Pt2Bi characterized by X-ray diffraction spectroscopy (phase composition), scanning tunneling microscopy (STM) (surface morphology), and COads stripping voltammetry (surface composition). Bulk composition of Pt2Bi revealed two phases-55% PtBi alloy and 45% Pt. Estimated contribution of pure Pt on the Pt2Bi surface (43.5%) determined by COads stripping voltammetry corresponds closely to bulk composition. Pt2Bi reveals high activity and stability in formic acid oxidation. High activity originates from the fact that formic acid oxidation proceeds completely through dehydrogenation path based on an ensemble effect. The high stability of Pt2Bi surface is induced by the suppression of Bi leaching as it was evidenced by insignificant changes of surface morphology and surface roughness shown by STM images before and after electrochemical treatment in formic acid containing solution. Pt2Bi is found to be powerful catalyst exhibiting up to two orders of magnitude larger current densities at 0.0 V and onset potential shifted for similar to 0.2 V to more negative value relative to Pt under steady-state condition.", publisher = "Springer, New York", journal = "Electrocatalysis", title = "High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation", pages = "352-346", number = "3-4", volume = "3", doi = "10.1007/s12678-012-0099-9" }
Lović, J., Obradović, M., Tripković, D., Popović, K., Jovanović, V. M., Gojković, S. Lj.,& Tripković, A.. (2012). High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation. in Electrocatalysis Springer, New York., 3(3-4), 346-352. https://doi.org/10.1007/s12678-012-0099-9
Lović J, Obradović M, Tripković D, Popović K, Jovanović VM, Gojković SL, Tripković A. High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation. in Electrocatalysis. 2012;3(3-4):346-352. doi:10.1007/s12678-012-0099-9 .
Lović, Jelena, Obradović, Maja, Tripković, Dušan, Popović, Ksenija, Jovanović, Vladislava M., Gojković, Snežana Lj., Tripković, Amalija, "High Activity and Stability of Pt2Bi Catalyst in Formic Acid Oxidation" in Electrocatalysis, 3, no. 3-4 (2012):346-352, https://doi.org/10.1007/s12678-012-0099-9 . .