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dc.contributor.authorZhuang, Linzhouen_US
dc.contributor.authorJia, Yien_US
dc.contributor.authorHe, Tianweien_US
dc.contributor.authorDu, Aijunen_US
dc.contributor.authorYan, Xuechengen_US
dc.contributor.authorGe, Leien_US
dc.contributor.authorZhu, Zhonghuaen_US
dc.contributor.authorYao, Xiangdongen_US
dc.date.accessioned2019-05-29T12:37:44Z
dc.date.available2019-05-29T12:37:44Z
dc.date.issued2018en_US
dc.identifier.issn1998-0124en_US
dc.identifier.doi10.1007/s12274-018-2050-8en_US
dc.identifier.urihttp://hdl.handle.net/10072/380799
dc.description.abstractThe oxygen evolution reaction (OER) represents the rate-determining step of electrocatalytic water splitting into hydrogen and oxygen. Creating oxygen vacancies and adjusting their density has proven to be an effective strategy to design high-performance OER catalysts. Herein, a hydrogenation method is applied to treat a two-dimensional (2D) iron-cobalt oxide (Fe1Co1Ox-origin), with the purpose of tuning its oxygen vacancy density. Notably, compared with Fe1Co1Ox-origin, the iron-cobalt oxide hydrogenated at 200 °C and 2.0 MPa optimized conditions exhibits a markedly improved OER activity in 1.0 M KOH (with an overpotential η of 225 mV at a current density of 10 mA·cm–2) and a rapid reaction kinetics (with a Tafel slope of 36.0 mV·dec–1). Moreover, the OER mass activity of the hydrogenated oxide is 1.9 times that of Fe1Co1Ox-origin at an overpotential of 350 mV. The experimental results, combined with density functional theory (DFT) calculations, reveal that the optimal control of oxygen vacancies in 2D Fe1Co1Ox via hydrogenation can improve the electronic conductivity and promote OH– adsorption onto nearby low-coordinated Co3+ sites, resulting in a significantly enhanced OER activity.en_US
dc.description.peerreviewedYesen_US
dc.languageEnglishen_US
dc.publisherSpringer Linken_US
dc.publisher.placeChinaen_US
dc.relation.ispartofpagefrom3509en_US
dc.relation.ispartofpageto3518en_US
dc.relation.ispartofissue6en_US
dc.relation.ispartofjournalNano Researchen_US
dc.relation.ispartofvolume11en_US
dc.subject.fieldofresearchOrganic Chemistry not elsewhere classifieden_US
dc.subject.fieldofresearchMultidisciplinaryen_US
dc.subject.fieldofresearchcode030599en_US
dc.subject.fieldofresearchcodeMDen_US
dc.titleTuning oxygen vacancies in two-dimensional iron-cobalt oxide nanosheets through hydrogenation for enhanced oxygen evolution activityen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Articlesen_US
dc.type.codeC - Journal Articlesen_US
gro.hasfulltextNo Full Text


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