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dc.contributor.authorGoryachev, Andrey
dc.contributor.authorPascuzzi, Marco Etzi Coller
dc.contributor.authorCarla, Francesco
dc.contributor.authorWeber, Tim
dc.contributor.authorOver, Herbert
dc.contributor.authorHensen, Emiel J. M.
dc.contributor.authorHofmann, Jan P.
dc.date.accessioned2021-07-12T11:11:13Z
dc.date.available2021-07-12T11:11:13Z
dc.date.issued2020
dc.identifier.citationGoryachev, A., Etzi Coller Pascuzzi, M., Carlà, F., Weber, T., Over, H., Hensen, E. J. M., & Hofmann, J. P. (2020). Electrochemical stability of RuO2(110)/Ru(0001) model electrodes in the oxygen and chlorine evolution reactions. Electrochimica Acta, 336, 135713. doi:10.1016/j.electacta.2020.135713
dc.identifier.issn1873-3859
dc.identifier.issn0013-4686
dc.identifier.doi10.1016/j.electacta.2020.135713
dc.identifier.urihttp://hdl.handle.net/10754/670145
dc.description.abstractRuO2 is commercially employed as an anodic catalyst in the chlor-alkali process. It is also one of the most active electrocatalysts for the oxidation of water, relevant to electrochemical water splitting. However, the use of RuO2 is limited by its low anodic stability under acidic conditions, especially at high overpotentials. In the present work, the electrochemical stability of model RuO2(110)/Ru(0001) anodes was investigated in order to gain a deeper understanding of the relation between structure and performance in Cl2 and O2 evolution reactions (CER and OER, respectively). Online electrochemical mass spectrometry was used to determine the onset potential of CER and OER in HCl and H2SO4 electrolytes, respectively. The onset potential of OER was higher in HCl than in H2SO4 due to competition with the kinetically more favorable CER. A detailed stability evaluation revealed pitting corrosion of the electrode surface with exposure of Ru(0001) metal substrate concomitant with the formation of a hydrous RuO2 in some areas regardless of the applied electrochemical treatment. However, despite local pitting, the RuO2(110) layer preserves its thickness in most areas. Degradation of the electrode was found to be less severe in 0.5 M HCl due to a decrease in the faradaic efficiency of RuO2 oxidation caused by competition with the kinetically more favorable CER.
dc.description.sponsorshipThe authors thank ESRF for technical and financial support during beam time IHCH-1283 at beamline ID03. Dr. Iman Sohrabnejad-Eskan of JLU Giessen and Dr. Johannes Pfrommer of DESY Hamburg are acknowledged for technical support and fruitful discussions. The authors would like to thank the following colleagues of Eindhoven University of Technology: Ad H. Wonders for useful discussions and assistance with the OLEMS measurements; Adelheid M. Elemans-Mehring for ICP-OES measurements; Alexey Bolshakov for assistance on synchrotron measurements. A.G. and E.J.M.H. acknowledge funding by the Dutch Research School Combination Catalysis Controlled by Chemical Design (NRSC-Catalysis) and an NWO Vici grant. M.E.C.P. acknowledges funding by a Graduate School program from the Netherlands Organization for Scientific Research (NWO). H.O. thanks BMBF (project: 05K2016-HEXCHEM) and DFG (Ov21-16 within SPP2080) for financial support.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0013468620301055
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in ELECTROCHIMICA ACTA. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in ELECTROCHIMICA ACTA, [336, , (2020)] DOI: 10.1016/j.electacta.2020.135713 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectElectrocatalysis
dc.subjectRuthenium dioxide
dc.subjectOxygen evolution reaction
dc.subjectChlorine evolution reaction
dc.subjectStability
dc.titleElectrochemical stability of RuO2(110)/Ru(0001) model electrodes in the oxygen and chlorine evolution reactions
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalELECTROCHIMICA ACTA
dc.identifier.wosutWOS:000512606400015
dc.eprint.versionPost-print
dc.contributor.institutionLaboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600MB, Eindhoven, the Netherlands
dc.contributor.institutionBeamline ID03, European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000, Grenoble, France
dc.contributor.institutionPhysikalisch-Chemisches Institut, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
dc.identifier.volume336
dc.identifier.pages135713
kaust.personGoryachev, Andrey
dc.identifier.eid2-s2.0-85078078760


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