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Oxygen evolution on nanocrystalline RuO2 and Ru0.9Ni0.1O2−δ electrodes – DEMS approach to reaction mechanism determination
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SYSNO ASEP 0330493 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Oxygen evolution on nanocrystalline RuO2 and Ru0.9Ni0.1O2−δ electrodes – DEMS approach to reaction mechanism determination Title Vylučování kyslíku na nanokrystalických RuO2 a Ru0,9 Ni0,1O2-δ elektrodách – použití DEMS v určování reakčního mechanismu Author(s) Macounová, Kateřina (UFCH-W) RID
Makarova, Marina (UFCH-W)
Krtil, Petr (UFCH-W) RID, ORCIDSource Title Electrochemistry Communications. - : Elsevier - ISSN 1388-2481
Roč. 11, č. 10 (2009), s. 1865-1868Number of pages 4 s. Language eng - English Country NL - Netherlands Keywords oxygen evolution ; DEMS ; ruthenium dioxide ; electrocatalysis Subject RIV CG - Electrochemistry R&D Projects KAN100400702 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IAA400400906 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000271571300005 DOI 10.1016/j.elecom.2009.08.004 Annotation The mechanism of the oxygen evolution on RuO2 and Ru0.9Ni0.1O2−δ anodes was studied in 0.1 M HClO4 using 18labeling combined with differential electrochemical mass spectrometry (DEMS). It was shown that the mechanism of the oxygen evolution is potential sensitive. At potentials negative to 1.12 V vs. SCE all the evolved oxygen originates from the electrolyte solution. At higher potentials an additional mechanism involving an exchange of the oxygen between electrolyte and electrocatalyst starts to apply. The extent of this oxygen exchange mechanism reflects the chemical composition of the electrocatalyst and is significantly higher at Ru0.9Ni0.1O2−δ electrodes. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2010
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