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|Title:||Effects of preparation conditions on performance of carbon-supported nanosize Pt-Co catalysts for methanol electro-oxidation under acidic conditions||Authors:||Zeng, J.
|Keywords:||Carbon monoxide resistance
|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|
|Appears in Collections:||Staff Publications|
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