Crabb, E. M., Ravikumar, M. K., Qian, Y. , Russell, A. E., Maniguet, 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. ISSN 1099-0062
Full content URL: http://dx.doi.org/10.1149/1.1419703
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| Item Type: | Article |
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| 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. |
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| Keywords: | carbon, platinum, catalysts, electrochemistry, transmission electron microscopy, EXAFS, fluorescence, oxidation, bond lengths, surface treatment, molybdenum |
| Subjects: | F Physical Sciences > F200 Materials Science F Physical Sciences > F170 Physical Chemistry F Physical Sciences > F190 Chemistry not elsewhere classified |
| Divisions: | College of Science > School of Engineering |
| ID Code: | 5434 |
| Deposited On: | 07 May 2012 20:12 |
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