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

Full text not available from this repository.

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

Repository Staff Only: item control page