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The effect of diluting ruthenium by iron in RuxSey catalyst for oxygen reduction

✍ Scribed by Cyril Delacôte; Adam Lewera; Marcin Pisarek; Pawel J. Kulesza; Piotr Zelenay; Nicolas Alonso-Vante

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
338 KB
Volume
55
Category
Article
ISSN
0013-4686

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✦ Synopsis

This study has focused on the synthesis of novel oxygen reduction reaction (ORR) chalcogenide catalysts, with Ru partially replaced by Fe in a cluster-type Ru x Se y . The catalysts were obtained by thermal decomposition of Ru 3 (CO) 12 and Fe(CO) 5 in the presence of Se. As indicated by the XPS data, the composition of catalyst nanoparticles depends on the solvent used (either p-xylene or dichlorobenzene). The presence of iron in synthesized catalysts has been confirmed by both EDAX and XPS. Voltammetric activation of the catalysts results in a partial removal of iron and unreacted selenium from the surface. The ORR performance of electrochemically pre-treated catalysts was evaluated using rotating disk and ring-disk electrodes in a sulfuric acid solution. No major change in the ORR mechanism relative to the Se/Ru catalyst has been observed with Fe-containing catalysts.

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