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Local structure of Co doped RuO2 nanocrystalline electrocatalytic materials for chlorine and oxygen evolution
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SYSNO ASEP 0434971 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Local structure of Co doped RuO2 nanocrystalline electrocatalytic materials for chlorine and oxygen evolution Author(s) Petrykin, Valery (UFCH-W)
Macounová, Kateřina (UFCH-W) RID
Okube, Maki (UFCH-W)
Mukerjee, S. (US)
Krtil, Petr (UFCH-W) RID, ORCIDSource Title Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 202, MAR 2013 (2013), s. 63-69Number of pages 7 s. Language eng - English Country NL - Netherlands Keywords oxygen evolution ; chlorine evolution ; oxide Subject RIV CG - Electrochemistry R&D Projects IAA400400906 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UFCH-W - RVO:61388955 UT WOS 000311939800009 EID SCOPUS 84870521003 DOI https://doi.org/10.1016/j.cattod.2012.03.075 Annotation Nano-particulate Co doped ruthenium dioxide electrocatalysts of the general formula Ru1-xCoxO2-y (0 < x 0.3) were prepared by a co-precipitation method. The electrocatalysts with x < 0.2 conform to a single phase nano-crystalline materials. On the local level the Co forms clusters dispersed in the original rutile-like matrix. The local environment of the Co conforms to a rutile model which preserves the cationic arrangement but suppresses the probability of the Ru-Ru and Co-Co neighbors along the shortest metal-metal bonds. The electrocatalytic activity of the synthesized Ru1-xCoxO2-y materials in oxygen evolution is comparable with that of the non-doped ruthenium dioxide and little depends on the actual Co content. In presence of chlorides the Co doped materials are more selective towards oxygen evolution compared with the non doped ruthenia. The enhanced oxygen evolution in the case of Co doped electrocatalysts can be attributed to a chemical recombination of surface confined oxo-species. The selectivity shift towards oxygen evolution can be linked with limited activity of the Ru1-xCoxO2-y materials in the chlorine evolution reaction which seems to be relatively weakly dependent on the chloride concentration. (C) 2012 Elsevier B.V. All rights reserved. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2015
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