Porous carbon anodes for the direct methanol fuel cell—I. The role of the reduction method for carbon supported platinum electrodes

The efficiency of platinised porous-carbon electrodes for the electrooxidation of methanol in H 2SO 4 is found to vary quite markedly with the method used to deposit the platinum. This is shown to be a consequence of both the size and the electronic nature of the platinum crystallites. The most effi...

Full description

Saved in:
Bibliographic Details
Published in:Electrochimica acta 1990, Vol.35 (1), p.199-207
Main Authors: Goodenough, J.B., Hamnett, A., Kennedy, B.J., Manoharan, R., Weeks, S.A.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The efficiency of platinised porous-carbon electrodes for the electrooxidation of methanol in H 2SO 4 is found to vary quite markedly with the method used to deposit the platinum. This is shown to be a consequence of both the size and the electronic nature of the platinum crystallites. The most efficient electrodes are those that possess both small crystallite sizes, ∼ 20 Å diameter, and a minimum amount of ionic platinum species as identified by XPS studies. A comparison is drawn with optimised platinised carbon electrodes for oxygen reduction, and an explanation for the different requirements of these two types of electrode suggested.
ISSN:0013-4686
1873-3859
DOI:10.1016/0013-4686(90)85059-V