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Direct Synthesis of Two Inorganic Catalysts on Carbon Fibres for the Electrocatalytic Oxidation of Water.
- Source :
- Chemistry - A European Journal; 1/12/2017, Vol. 23 Issue 3, p568-575, 8p
- Publication Year :
- 2017
-
Abstract
- Two electrodes for anodic water oxidation made by direct synthesis of inorganic catalysts onto conductive carbon fibre sheets are evaluated. As catalysts two Co- and Sb-containing phases were tested, that is, Co<subscript>3</subscript>Sb<subscript>4</subscript>O<subscript>6</subscript>F<subscript>6</subscript> and the new compound CoSbO<subscript>4</subscript>. The compounds express large differences in their morphology: CoSbO<subscript>4</subscript> grows as thin needles whereas Co<subscript>3</subscript>Sb<subscript>4</subscript>O<subscript>6</subscript>F<subscript>6</subscript> grows as larger facetted crystals. Despite the smaller surface area the latter compound shows a better catalytic performance. When the compound Co<subscript>3</subscript>Sb<subscript>4</subscript>O<subscript>6</subscript>F<subscript>6</subscript> was used it gave a low increase of +0.028 mV h<superscript>−1</superscript> at an overpotential of η=472 mV after 10 h and a stability of +0.48 mV h<superscript>−1</superscript> at an overpotential of η=488 mV after 60 h. The leakages of Co and Sb were negligible and only <0.001 at % Co and approximately 0.02 at % Sb were detected in the electrolyte. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 23
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 120748490
- Full Text :
- https://doi.org/10.1002/chem.201603085