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dc.contributor.authorEtzi Coller Pascuzzi, Marco
dc.contributor.authorMan, Alex J.W.
dc.contributor.authorGoryachev, Andrey
dc.contributor.authorHofmann, Jan P.
dc.contributor.authorHensen, Emiel J.M.
dc.date.accessioned2020-11-09T06:06:36Z
dc.date.available2020-11-09T06:06:36Z
dc.date.issued2020
dc.date.submitted2020-06-10
dc.identifier.citationEtzi Coller Pascuzzi, M., Man, A. J. W., Goryachev, A., Hofmann, J. P., & Hensen, E. J. M. (2020). Investigation of the stability of NiFe-(oxy)hydroxide anodes in alkaline water electrolysis under industrially relevant conditions. Catalysis Science & Technology, 10(16), 5593–5601. doi:10.1039/d0cy01179g
dc.identifier.issn2044-4761
dc.identifier.issn2044-4753
dc.identifier.doi10.1039/d0cy01179g
dc.identifier.urihttp://hdl.handle.net/10754/665863
dc.description.abstractNiFe-(Oxy)hydroxide is one of the most active electrocatalysts for the oxygen evolution reaction (OER) in alkaline conditions. Herein we investigated the stability of NiFe-(oxy)hydroxide anodes at high current densities (100 mA cm-2) at different temperatures (25, 75 °C) and base concentrations (1, 5, 10 M KOH). While polarization led to minor structural and compositional changes under standard conditions (25 °C, 1 M KOH), the anodes were severely impacted at higher temperature (75 °C) and base concentrations (5, 10 M KOH). Overall leaching and preferential leaching of Fe (resulting in a lower Fe/Ni ratio) led to decreased OER performance and increased charge transfer resistance for the samples tested at industrially relevant conditions. A dramatic loss in the catalytic activity occurred for the sample polarized at 75 °C in 10 M KOH: besides extensive leaching, a transformation of Ni(OH)2 into NiO was noted in this case. For pure NiOxHy, incorporation of Fe impurities from the electrolyte during polarization at 75 °C in 5 M KOH led to an improvement in the catalytic activity and charge-transfer properties, approaching the performance of NiFeOxHy.
dc.description.sponsorshipThe authors thank Adelheid Elemans-Mehring for ICP-OES measurements. M. E. C. P. acknowledges funding by a Graduate School program from the Netherlands Organization for Scientific Research (NWO). A. G. and E. J. M. H. acknowledge funding from an NWO Vici grant.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=D0CY01179G
dc.rightsThis article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.titleInvestigation of the stability of NiFe-(oxy)hydroxide anodes in alkaline water electrolysis under industrially relevant conditions
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCatalysis Science and Technology
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionLaboratory of Inorganic Materials and Catalysis, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands Email: j.p.hofmann@tue.nl;e.j.m.hensen@tue.nl
dc.contributor.institutionSurface Science Laboratory, Department of Materials and Earth Sciences, Technical University of Darmstadt, Otto-Berndt-Strasse 3, 64287 Darmstadt, Germany.
dc.identifier.volume10
dc.identifier.issue16
dc.identifier.pages5593-5601
kaust.personGoryachev, Andrey
dc.date.accepted2020-07-16
dc.identifier.eid2-s2.0-85094965938
refterms.dateFOA2020-11-09T06:07:32Z


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