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author:

Guo, Y. (Guo, Y..) [1] | Zheng, D. (Zheng, D..) [2] | Liu, H. (Liu, H..) [3] | Friedrich, A. (Friedrich, A..) [4] | Garche, J. (Garche, J..) [5]

Indexed by:

Scopus

Abstract:

The mechanism of the CH3OH oxidation on the Pt/C and Pt-Ru/C electrodes has been studied by the cyclic voltammetry and potential oscillation. It is found that the rate of the CH3OH oxidation depends on various adsorbates such as CHOHads, COads, OHads and Oads on the electrode surface. When the coverage of both CO ads and OHads is relatively high, an auto-catalysis occurs by oxidizing the bridge-bonded adsorbates into linear-bonded COads, which produces more vacant sites. Both the formation of the OHads and desorption of the COads are a couple of competitive reactions. This can lead to the potential oscillation. And the diffusion of the CH3OH in the solution affects the rate of its oxidation as well. © J. New. Mat. Electrochem. Systems.

Keyword:

DMFC; Electrocatalyst; Mechanism; Methanol oxidation

Community:

  • [ 1 ] [Guo, Y.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
  • [ 2 ] [Zheng, D.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
  • [ 3 ] [Liu, H.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350002, China
  • [ 4 ] [Friedrich, A.]Center for Solar Energy and Hydrogen Research, D-89081 Ulm, Germany
  • [ 5 ] [Garche, J.]Center for Solar Energy and Hydrogen Research, D-89081 Ulm, Germany

Reprint 's Address:

  • [Guo, Y.]College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, 350002, China

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Source :

Journal of New Materials for Electrochemical Systems

ISSN: 1480-2422

Year: 2006

Issue: 1

Volume: 9

Page: 33-39

1 . 0 9 5

JCR@2006

0 . 7 0 0

JCR@2023

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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