Controlled modification of carbon supported platinum electrocatalysts by Mo

Crabb, E. M., Ravikumar, M. K., Qian, Y., Russell, A. E., Maniguet, S., Yao, Jun, 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. ISSN 1099-0062

Full content URL: http://esl.ecsdl.org/content/5/1/A5

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Item Type:Article
Item Status:Live Archive

Abstract

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.

Additional Information: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.
Keywords:Platinum, carbon, catalysts, electrochemistry, transmission electron microscopy, EXAFS, fluorescence, oxidation, bond lengths, surface treatment, molybdenum
Subjects:J Technologies > J500 Materials Technology not otherwise specified
Divisions:College of Science > School of Engineering
ID Code:7608
Deposited On:22 Feb 2013 11:01

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