Record activity and stability of dealloyed bimetallic catalysts for proton exchange membrane fuel cells

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dc.contributor.authorHan, Binghong
dc.contributor.authorCarlton, Christopher E.
dc.contributor.authorKongkanand, Anusorn
dc.contributor.authorKukreja, Ratandeep S.
dc.contributor.authorTheobald, Brian R.
dc.contributor.authorGan, Lin
dc.contributor.authorO'Malley, Rachel
dc.contributor.authorStrasser, Peter
dc.contributor.authorWagner, Frederick T.
dc.contributor.authorShao-Horn, Yang
dc.date.accessioned2017-10-25T06:29:17Z
dc.date.available2017-10-25T06:29:17Z
dc.date.issued2015
dc.description.abstractWe demonstrate the unprecedented proton exchange membrane fuel cell (PEMFC) performance durability of a family of dealloyed Pt-Ni nanoparticle catalysts for the oxygen reduction reaction (ORR), exceeding scientific and technological state-of-art activity and stability targets. We provide atomic-scale insight into key factors controlling the stability of the cathode catalyst by studying the influence of particle size, the dealloying protocol and post-acid-treatment annealing on nanoporosity and passivation of the alloy nanoparticles. Scanning transmission electron microscopy coupled to energy dispersive spectroscopy data revealed the compositional variations of Ni in the particle surface and core, which were combined with an analysis of the particle morphology evolution during PEMFC voltage cycling; together, this enabled the elucidation of alloy structure and compositions conducive to long-term PEMFC device stability. We found that smaller size, less-oxidative acid treatment and annealing significantly reduced Ni leaching and nanoporosity formation while encouraged surface passivation, all resulting in improved stability and higher catalytic ORR activity. This study demonstrates a successful example of how a translation of basic catalysis research into a real-life device technology may be done.en
dc.description.sponsorshipDFG, SPP 1613, Regenerativ erzeugte Brennstoffe durch lichtgetriebene Wasserspaltung: Aufklärung der Elementarprozesse und Umsetzungsperspektiven auf technologische Konzepten
dc.identifier.eissn1754-5706
dc.identifier.issn1754-5692
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6980
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6319
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subject.ddc690 Hausbau, Bauhandwerkde
dc.titleRecord activity and stability of dealloyed bimetallic catalysts for proton exchange membrane fuel cellsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c4ee02144d
dcterms.bibliographicCitation.issue1
dcterms.bibliographicCitation.journaltitleEnergy & environmental scienceen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend266
dcterms.bibliographicCitation.pagestart258
dcterms.bibliographicCitation.volume8
tub.accessrights.dnbfree
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 Berlin

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