Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jpowsour.2004.08.022
Title: Effects of preparation conditions on performance of carbon-supported nanosize Pt-Co catalysts for methanol electro-oxidation under acidic conditions
Authors: Zeng, J.
Lee, J.Y. 
Keywords: Carbon monoxide resistance
Catalyst
Fuel cell
Methanol electro-oxidation
Nanoparticles
Pt-Co
Issue Date: 2-Feb-2005
Citation: Zeng, J., Lee, J.Y. (2005-02-02). Effects of preparation conditions on performance of carbon-supported nanosize Pt-Co catalysts for methanol electro-oxidation under acidic conditions. Journal of Power Sources 140 (2) : 268-273. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jpowsour.2004.08.022
Abstract: Carbon-supported Pt-Co and Pt catalysts are prepared by NaBH4 reduction of metal precursors. The particles size of Pt-Co varies with the pH used in the preparation, it is largest (12 nm) in alkaline solution and smallest (3.7 nm) in un-buffered solution. For the latter, X-ray photoelectron spectroscopy shows that Pt exists principally in the metallic state, whereas cobalt is mostly oxidized. The performance of the catalysts for methanol electro-oxidation in acidic media at room temperature is evaluated and compared with that of a Pt/C catalyst. Electrochemical measurements by cyclic voltammetry and chronoamperometry demonstrate consistently high catalytic activities and improved resistance to carbon monoxide for the Pt-Co catalysts, particularly for that prepared in un-buffered solution. © 2004 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
URI: http://scholarbank.nus.edu.sg/handle/10635/88812
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2004.08.022
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