Efficient C-C bond splitting on Pt monolayer and sub-monolayer catalysts during ethanol electro-oxidation: Pt layer strain and morphology effects

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dc.contributor.authorLoukrakpam, Rameshwori
dc.contributor.authorYuan, Qiuyi
dc.contributor.authorPetkov, Valeri
dc.contributor.authorGan, Lin
dc.contributor.authorRudi, Stefan
dc.contributor.authorYang, Ruizhi
dc.contributor.authorHuang, Yunhui
dc.contributor.authorBrankovic, Stanko R.
dc.contributor.authorStrasser, Peter
dc.date.accessioned2016-06-22T08:05:24Z
dc.date.available2016-06-22T08:05:24Z
dc.date.issued2014
dc.description.abstractEfficient catalytic C–C bond splitting coupled with complete 12-electron oxidation of the ethanol molecule to CO2is reported on nanoscale electrocatalysts comprised of a Pt monolayer (ML) and sub-monolayer (sML) deposited on Au nanoparticles (Au@Pt ML/sML). The Au@Pt electrocatalysts were synthesized using surface limited redox replacement (SLRR) of an underpotentially deposited (UPD) Cu monolayer in an electrochemical cell reactor. Au@Pt ML showed improved catalytic activity for ethanol oxidation reaction (EOR) and, unlike their Pt bulk and Pt sML counterparts, was able to generate CO2at very low electrode potentials owing to efficient C–C bond splitting. To explain this, we explore the hypothesis that competing strain effects due to the Pt layer coverage/morphology (compressive) and the Pt–Au lattice mismatch (tensile) control surface chemisorption and overall activity. Control experiments on well-defined model Pt monolayer systems are carried out involving a wide array of methods such as high-energy X-ray diffraction, pair-distribution function (PDF) analysis,in situelectrochemical FTIR spectroscopy, andin situscanning tunneling microscopy. The vibrational fingerprints of adsorbed CO provide compelling evidence on the relation between surface bond strength, layer strain and morphology, and catalytic activity.en
dc.description.sponsorshipBMBF, 16N11929, Netzwerk TU9/CN Elektromobilität - Teilvorhaben: Brennstoffzellen Range-Extenderen
dc.identifier.eissn1463-9076
dc.identifier.pmid25081353
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/5588
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-5217
dc.language.isoen
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.titleEfficient C-C bond splitting on Pt monolayer and sub-monolayer catalysts during ethanol electro-oxidation: Pt layer strain and morphology effectsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c4cp02791d
dcterms.bibliographicCitation.issue35
dcterms.bibliographicCitation.journaltitlePhysical chemistry, chemical physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend18876
dcterms.bibliographicCitation.pagestart18866
dcterms.bibliographicCitation.volume16
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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