Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 89, Issue 3-4, Pages 455-458Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2009.01.003
Keywords
Biofuel cells; Microbial fuel cells; Microbial electrolysis cell; Hydrogen evolution reaction; Electrocatalysis; Tungsten carbide
Funding
- Deutschen Bundesstiftung Utnwelt (DBU)
- Studienstiftung des deutschen Volkes
- Heisenberg program of the Deutsche Forschungsgemeinschaft (DFG)
- Fond der Chemischen Industrie
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In this communication we demonstrate that tungsten carbide, WC, is a promising electrocatalyst for the hydrogen evolution reaction in pH neutral electrolytes. In a systematic investigation of mixed catalysts containing different fractions of WC, W2C, W and WO2 we show that the performance of the catalyst is proportional to its WC content, whereas W2C, W and WO2 play only a minor role. The relationship between WC content and electrocatalytic activity indicates that hydrogen evolution and oxidation are related to similar surface sites preferentially formed on WC In contrast to anodic conditions, the cathodic polarization diminishes corrosion processes and thus increases the long term stability. (C) 2009 Elsevier B.V. All rights reserved.
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