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.; Ball, S. C.

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.

Citation

Crabb, E. M., Ravikumar, M. K., Qian, Y., Russell, A. E., Maniguet, S., Yao, J., …Ball, S. C. (2002). Controlled modification of carbon supported platinum electrocatalysts by Mo. Electrochemical and Solid-State Letters, 5(1), https://doi.org/10.1149/1.1419703

• Journal Article Type: Article
• Publication Date: 2002
• Deposit Date: Apr 17, 2021
• Journal: Electrochemical and Solid-State Letters
• Print ISSN: 1099-0062
• Publisher: Electrochemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Issue: 1
• Article Number: A5
• DOI: https://doi.org/10.1149/1.1419703
• Keywords: Physical and Theoretical Chemistry; Electrical and Electronic Engineering; Electrochemistry; General Materials Science; General Chemical Engineering
• Public URL: https://uwe-repository.worktribe.com/output/7268384