Gas-phase chemistry to understand electrochemical hydrogen evolution and oxidation on doped transition metal sulfides

Singh, Nirala, Upham, David Chester, Metiu, Horia and McFarland, Eric W. (2013) Gas-phase chemistry to understand electrochemical hydrogen evolution and oxidation on doped transition metal sulfides. Journal of the Electrochemical Society, 160 10: A1902-A1906. doi:10.1149/2.002311jes


Author Singh, Nirala
Upham, David Chester
Metiu, Horia
McFarland, Eric W.
Title Gas-phase chemistry to understand electrochemical hydrogen evolution and oxidation on doped transition metal sulfides
Journal name Journal of the Electrochemical Society   Check publisher's open access policy
ISSN 0013-4651
1945-7111
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.1149/2.002311jes
Volume 160
Issue 10
Start page A1902
End page A1906
Total pages 5
Place of publication Pennington, NJ, United States
Publisher Electrochemical Society
Language eng
Formatted abstract
RuS2 and cobalt-doped RuS2 are good catalysts for electrochemical hydrogen evolution in a hydrogen bromine proton exchange membrane based electrochemical flow cell, but their activity for hydrogen oxidation is low. We used temperature programmed reaction (TPR) methods to study the formation of HD from gaseous H2 and D2 catalyzed by these electrode materials. We found that they are active for HD exchange at room temperature and conclude that electrochemical hydrogen oxidation is not limited by the inability of the electrodes to adsorb or dissociate hydrogen. Therefore, we further conclude that the low activity for hydrogen electrooxidation on these semiconducting chalcogenides is due to electronic factors which limit the ability of the semiconductors to accept electrons or pass current. We recommend therefore the use of conducting compounds stable in HBr.
Keyword Acid Electrolysis
Exchange Current
J23 (2005)
Electrocatalysis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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