Investigations of bifunctional mechanism in methanol oxidation on carbon-supported Pt and Pt-Ru catalysts - Details

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]

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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

Email：

yguo@fzu.edu.cn

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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

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ESI Highly Cited Papers on the List： 0 Unfold All

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