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Controlled modification of carbon supported platinum electrocatalysts by Mo

Crabb, E.M.; Ravikumar, M.K.; Qian, Y.; Russell, A.E.; Maniquet, S.; Yao, J.; Thompsett, D.; Hurford, M. and Ball, S.C. (2002). Controlled modification of carbon supported platinum electrocatalysts by Mo. Electrochemical and Solid-State Letters, 5(1) A5-A9.

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A carbon-supported platinum electrocatalyst was modified with molybdenum using surface organometallic chemistry. The catalyst was characterized using transmission electron microscopy, cyclic voltammetry (CV), polarization studies, and in situ fluorescence extended X-ray absorption fine structure (EXAFS) studies. The CV and polarization studies show that CO oxidation starts at low overpotentials, similar to those of a conventially prepared PtCoMo/C electrocatalyst. EXAFS at the Mo K edge recorded at 0.65 V show that the Mo exists as an oxide species associated with the Pt surface with a Mo-O distance of 1.75 Å. At 0.05 V this oxide is reduced with the formation of a metal-metal bond between the Mo and Pt, with a bond distance of 2.63 Å. ©2001 The Electrochemical Society. All rights reserved.

Item Type: Article
ISSN: 1099-0062
Extra Information: Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract.
Keywords: Surface Organometallic Chemistry; Absorption Fine-Structure; H-2/Co Mixtures; co Tolerance; Fuel-Cells; Electrooxidation; catalysts; electrode; Monoxide; deposition
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Interdisciplinary Research Centre: Biomedical Research Network (BRN)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 6100
Depositing User: Astrid Peterkin
Date Deposited: 22 Dec 2006
Last Modified: 04 Oct 2016 09:57
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