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Ruthenium selenide catalysts for cathodic oxygen reduction in direct methanol fuel cells.

Authors :
Racz, Alexander
Bele, Petra
Cremers, Carsten
Stimming, Ulrich
Source :
Journal of Applied Electrochemistry. Dec2007, Vol. 37 Issue 12, p1455-1462. 8p. 2 Black and White Photographs, 11 Graphs.
Publication Year :
2007

Abstract

The oxygen reduction reaction in sulphuric acid on commercial carbon supported platinum and ruthenium catalysts as well as on a home-made carbon supported ruthenium selenide catalysts (RuSe x /C) was investigated. The RuSe x /C catalysts were synthesised using similar procedures to those found in the literature. A dependency of H2O2 formation on the selenium content was found using the thin-film rotating ring disc electrode technique, namely that the H2O2 formation in the typical operation range of a Direct Methanol Fuel Cell (0.7–0.4 V) on Pt/C is below 1% and 1–4% on Ru/C and RuSe x /C catalysts. Finally for comparing the intrinsic activities of the catalysts the electrochemically active surface areas were determined in-situ by means of copper underpotential deposition. Our results indicate a comparable activity of the present RuSe x /C catalyst to commercial Pt/C if the activities are related to the electrochemical active areas. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0021891X
Volume :
37
Issue :
12
Database :
Academic Search Index
Journal :
Journal of Applied Electrochemistry
Publication Type :
Academic Journal
Accession number :
27336775
Full Text :
https://doi.org/10.1007/s10800-007-9361-x