Experimental Activity Descriptors for Iridium-based Catalysts for the Electrochemical Oxygen Evolution Reaction (OER)

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dc.contributor.authorSpöri, Camillo Wolfgang
dc.contributor.authorBriois, Pascal
dc.contributor.authorNong, Hong Nhan
dc.contributor.authorReier, Tobias
dc.contributor.authorBillard, Alain
dc.contributor.authorKühl, Stefanie
dc.contributor.authorTeschner, Detre
dc.contributor.authorStrasser, Peter
dc.date.accessioned2019-08-19T10:30:39Z
dc.date.available2019-08-19T10:30:39Z
dc.date.issued2019-06-13
dc.description.abstractRecent progress in the activity improvement of anode catalysts for acidic electrochemical water splitting was largely achieved through empirical studies of iridium-based bimetallic oxides. However, practical, experimentally accessible, yet general predictors of catalytic OER activity are lacking. This study investigates iridium and iridium-nickel thin film model electrocatalysts for the OER and identifies a set of general ex situ properties that allow the reliable prediction of their OER activity. Well defined Ir-based catalysts of various chemical nature and composition were synthesized by magnetron sput-tering. Correlation of physico-chemical and electrocatalytic properties revealed two experimental OER activity descriptors that are able to predict trends in the OER activity of unknown Ir based catalyst systems. More specifically, our study demonstrates that the IrIII+ and OH-surface concentration of the oxide catalyst constitute closely correlated, and generally applicable OER activity predictors. Based on these, an experimental volcano relationship of Ir-based OER electrocatalysts is presented and discussed.en
dc.identifier.eissn2155-5435
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/9677
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-8720
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-8601
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otherelectrolysisen
dc.subject.otherOERen
dc.subject.otherelectrolyzersen
dc.subject.otherfigures of meriten
dc.subject.otherwater splittingen
dc.subject.othercatalyst designen
dc.subject.othervolcano relationshipen
dc.subject.otheroxide formation and growthen
dc.titleExperimental Activity Descriptors for Iridium-based Catalysts for the Electrochemical Oxygen Evolution Reaction (OER)en
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1021/acscatal.9b00648en
dcterms.bibliographicCitation.issue8en
dcterms.bibliographicCitation.journaltitleACS catalysisen
dcterms.bibliographicCitation.originalpublishernameAmerican Chemical Societyen
dcterms.bibliographicCitation.originalpublisherplaceWashington, DCen
dcterms.bibliographicCitation.pageend6663en
dcterms.bibliographicCitation.pagestart6653en
dcterms.bibliographicCitation.volume9en
tub.accessrights.dnbdomain*
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Technische Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Technische Chemiede
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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