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Selectivity of Ru-rich Ru-Ti-O oxide surfaces in parallel oxygen and chlorine evolution reactions
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SYSNO ASEP 0559888 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Selectivity of Ru-rich Ru-Ti-O oxide surfaces in parallel oxygen and chlorine evolution reactions Author(s) Minhová Macounová, Kateřina (UFCH-W) RID, ORCID
Pittkowski, Rebecca (UFCH-W)
Nebel, Roman (UFCH-W) RID, ORCID
Zitolo, A. (FR)
Krtil, Petr (UFCH-W) RID, ORCIDArticle number 140878 Source Title Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 427, SEP 2022 (2022)Number of pages 13 s. Language eng - English Country GB - United Kingdom Keywords Ru-Ti-O oxides ; oxygen evolution ; chlorine evolution Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA21-03037S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000852802700004 EID SCOPUS 85135861281 DOI 10.1016/j.electacta.2022.140878 Annotation The electrocatalytic behaviour of single-phase Ru1-xTixO2 materials was studied to outline general trends controlling the selectivity of oxide-based anodes in parallel oxygen evolution and chlorine evolution reactions. Materials with x ranging between 0 and 0.2 were prepared by spray freeze freeze drying approach. Prepared materials show a non-homogeneous distribution of Ti in the structure with dominant clustering of the Ti along the (001) direction. For materials with x higher than 0.1 the dominant linear clustering of Ti along the z-axis changes, including Ti clustering also along (111) direction. Prepared materials are active in both oxygen evolution and chlorine evolution reactions. The Ti has a pronounced effect on the selectivity of the prepared materials. Ti presence affects the selectivity of the prepared materials in a complex manner. Materials featuring a low Ti content (x∼0.05) retain a preference for oxygen evolution reaction even in presence of chlorides and are more selective for oxygen evolution than pure RuO2. The selectivity towards chlorine evolution increases with increasing Ti content and, apparently, also with clustering of Ti along the (111) direction. The selectivity towards chlorine evolution may be related to the tendency of the prepared catalysts to evolve the oxygen via lattice oxygen evolution reaction (LOER) reflecting the ability of the catalyst surface to form active sites under operando conditions. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0333016
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