Tuning the Electronic Structure of Titanium Oxide Support to Enhance the Electrochemical Activity of Platinum Nanoparticles

Handle URI:
http://hdl.handle.net/10754/599844
Title:
Tuning the Electronic Structure of Titanium Oxide Support to Enhance the Electrochemical Activity of Platinum Nanoparticles
Authors:
Shi, Feifei; Baker, L. Robert; Hervier, Antoine; Somorjai, Gabor A.; Komvopoulos, Kyriakos
Abstract:
Two times higher activity and three times higher stability in methanol oxidation reaction, a 0.12 V negative shift of the CO oxidation peak potential, and a 0.07 V positive shift of the oxygen reaction potential compared to Pt nanoparticles on pristine TiO2 support were achieved by tuning the electronic structure of the titanium oxide support of Pt nanoparticle catalysts. This was accomplished by adding oxygen vacancies or doping with fluorine. Experimental trends are interpreted in the context of an electronic structure model, showing an improvement in electrochemical activity when the Fermi level of the support material in Pt/TiOx systems is close to the Pt Fermi level and the redox potential of the reaction. The present approach provides guidance for the selection of the support material of Pt/TiOx systems and may be applied to other metal-oxide support materials, thus having direct implications in the design and optimization of fuel cell catalyst supports. © 2013 American Chemical Society.
Citation:
Shi F, Baker LR, Hervier A, Somorjai GA, Komvopoulos K (2013) Tuning the Electronic Structure of Titanium Oxide Support to Enhance the Electrochemical Activity of Platinum Nanoparticles. Nano Lett 13: 4469–4474. Available: http://dx.doi.org/10.1021/nl402392u.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
Issue Date:
11-Sep-2013
DOI:
10.1021/nl402392u
PubMed ID:
23924204
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
The authors thank Dr. Philip N. Ross, Jr., for helpful discussions on elertocatalysis, Zhongwei Zhu for assistance in XPS spectra acquisition, and Yimin Li and Hailiang Wang for fruitful discussions. TiO<INF>x</INF> film deposition was carried out at the Marvell Nano Lab, University of California, Berkeley (UCB). SEM and XPS studies were carried out at the Molecular Foundry, Lawrence Berkeley National Laboratory. This research was supported by the UCB-KAUST Academic Excellence Alliance (AEA) Program.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorShi, Feifeien
dc.contributor.authorBaker, L. Roberten
dc.contributor.authorHervier, Antoineen
dc.contributor.authorSomorjai, Gabor A.en
dc.contributor.authorKomvopoulos, Kyriakosen
dc.date.accessioned2016-02-28T06:42:41Zen
dc.date.available2016-02-28T06:42:41Zen
dc.date.issued2013-09-11en
dc.identifier.citationShi F, Baker LR, Hervier A, Somorjai GA, Komvopoulos K (2013) Tuning the Electronic Structure of Titanium Oxide Support to Enhance the Electrochemical Activity of Platinum Nanoparticles. Nano Lett 13: 4469–4474. Available: http://dx.doi.org/10.1021/nl402392u.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid23924204en
dc.identifier.doi10.1021/nl402392uen
dc.identifier.urihttp://hdl.handle.net/10754/599844en
dc.description.abstractTwo times higher activity and three times higher stability in methanol oxidation reaction, a 0.12 V negative shift of the CO oxidation peak potential, and a 0.07 V positive shift of the oxygen reaction potential compared to Pt nanoparticles on pristine TiO2 support were achieved by tuning the electronic structure of the titanium oxide support of Pt nanoparticle catalysts. This was accomplished by adding oxygen vacancies or doping with fluorine. Experimental trends are interpreted in the context of an electronic structure model, showing an improvement in electrochemical activity when the Fermi level of the support material in Pt/TiOx systems is close to the Pt Fermi level and the redox potential of the reaction. The present approach provides guidance for the selection of the support material of Pt/TiOx systems and may be applied to other metal-oxide support materials, thus having direct implications in the design and optimization of fuel cell catalyst supports. © 2013 American Chemical Society.en
dc.description.sponsorshipThe authors thank Dr. Philip N. Ross, Jr., for helpful discussions on elertocatalysis, Zhongwei Zhu for assistance in XPS spectra acquisition, and Yimin Li and Hailiang Wang for fruitful discussions. TiO<INF>x</INF> film deposition was carried out at the Marvell Nano Lab, University of California, Berkeley (UCB). SEM and XPS studies were carried out at the Molecular Foundry, Lawrence Berkeley National Laboratory. This research was supported by the UCB-KAUST Academic Excellence Alliance (AEA) Program.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectelectrochemical activityen
dc.subjectElectronic structureen
dc.subjectplatinum nanoparticlesen
dc.subjectstrong metal support interactionen
dc.subjecttitanium oxideen
dc.titleTuning the Electronic Structure of Titanium Oxide Support to Enhance the Electrochemical Activity of Platinum Nanoparticlesen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionUC Berkeley, Berkeley, United Statesen
dc.contributor.institutionLawrence Berkeley National Laboratory, Berkeley, United Statesen
kaust.grant.programAcademic Excellence Alliance (AEA)en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.