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Article: Core-shell TiO 2/C nanofibers as supports for electrocatalytic and synergistic photoelectrocatalytic oxidation of methanol

TitleCore-shell TiO 2/C nanofibers as supports for electrocatalytic and synergistic photoelectrocatalytic oxidation of methanol
Authors
KeywordsCarbon shells
Core-shell
Current decay
Electrocatalytic
Electrochemical experiments
Issue Date2012
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp
Citation
Journal Of Materials Chemistry, 2012, v. 22 n. 9, p. 4025-4031 How to Cite?
Abstract
Carbon-coated TiO 2 fibers were synthesized as core-shell structured supports for highly dispersed Pt nanoparticles. The catalyst samples were characterized by XRD, Raman, TGA, SEM, TEM and EDX. Performance of methanol oxidation was evaluated in aqueous H 2SO 4 solutions with methanol by cyclic voltammetry and chronoamperometry. The TiO 2 nanofibers were coated with carbon shells mostly between 5 and 10 nm in thickness. Platinum nanoparticles around 2 nm were evenly deposited onto the as-synthesized carbon-coated TiO 2 fibers, denoted as Pt-TiO 2/C. Electrochemical experiments showed that the peak current density of methanol oxidation in the forward scan was significantly increased by 7.3 and 2.5 times on Pt-TiO 2/C compared with those of Pt-TiO 2 and Pt-C (Vulcan XC-72), respectively. Furthermore, the Pt-TiO 2/C electro-catalyst exhibited a lower onset potential and slower current decay than Pt-C, suggesting higher catalytic activity and better stability. In photo-electrochemical experiments, the electro-catalytic and photo-catalytic properties of Pt-TiO 2/C have been synergistically coupled to boost the performance of methanol oxidation. Under UV irradiation, the total peak current density of methanol oxidation on Pt-TiO 2/C is enhanced 2.5 times as that in the dark. In brief, the cooperation between Pt, carbon shell and TiO 2 support promotes methanol oxidation on Pt-TiO 2/C with and without UV illumination. © 2012 The Royal Society of Chemistry.
Persistent Identifierhttp://hdl.handle.net/10722/168643
ISSN
2013 Impact Factor: 6.626
ISI Accession Number ID
References

 

Author Affiliations
  1. Nanjing University of Technology
  2. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorLi, Wen_US
dc.contributor.authorBai, Yen_US
dc.contributor.authorLi, Fen_US
dc.contributor.authorLiu, Cen_US
dc.contributor.authorChan, KYen_US
dc.contributor.authorFeng, Xen_US
dc.contributor.authorLu, Xen_US
dc.date.accessioned2012-10-08T03:23:53Z-
dc.date.available2012-10-08T03:23:53Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Materials Chemistry, 2012, v. 22 n. 9, p. 4025-4031en_US
dc.identifier.issn0959-9428en_US
dc.identifier.urihttp://hdl.handle.net/10722/168643-
dc.description.abstractCarbon-coated TiO 2 fibers were synthesized as core-shell structured supports for highly dispersed Pt nanoparticles. The catalyst samples were characterized by XRD, Raman, TGA, SEM, TEM and EDX. Performance of methanol oxidation was evaluated in aqueous H 2SO 4 solutions with methanol by cyclic voltammetry and chronoamperometry. The TiO 2 nanofibers were coated with carbon shells mostly between 5 and 10 nm in thickness. Platinum nanoparticles around 2 nm were evenly deposited onto the as-synthesized carbon-coated TiO 2 fibers, denoted as Pt-TiO 2/C. Electrochemical experiments showed that the peak current density of methanol oxidation in the forward scan was significantly increased by 7.3 and 2.5 times on Pt-TiO 2/C compared with those of Pt-TiO 2 and Pt-C (Vulcan XC-72), respectively. Furthermore, the Pt-TiO 2/C electro-catalyst exhibited a lower onset potential and slower current decay than Pt-C, suggesting higher catalytic activity and better stability. In photo-electrochemical experiments, the electro-catalytic and photo-catalytic properties of Pt-TiO 2/C have been synergistically coupled to boost the performance of methanol oxidation. Under UV irradiation, the total peak current density of methanol oxidation on Pt-TiO 2/C is enhanced 2.5 times as that in the dark. In brief, the cooperation between Pt, carbon shell and TiO 2 support promotes methanol oxidation on Pt-TiO 2/C with and without UV illumination. © 2012 The Royal Society of Chemistry.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.aspen_US
dc.relation.ispartofJournal of Materials Chemistryen_US
dc.subjectCarbon shells-
dc.subjectCore-shell-
dc.subjectCurrent decay-
dc.subjectElectrocatalytic-
dc.subjectElectrochemical experiments-
dc.titleCore-shell TiO 2/C nanofibers as supports for electrocatalytic and synergistic photoelectrocatalytic oxidation of methanolen_US
dc.typeArticleen_US
dc.identifier.emailChan, KY:hrsccky@hku.hken_US
dc.identifier.authorityChan, KY=rp00662en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/c2jm14847aen_US
dc.identifier.scopuseid_2-s2.0-84863121153en_US
dc.identifier.hkuros203305-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863121153&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume22en_US
dc.identifier.issue9en_US
dc.identifier.spage4025en_US
dc.identifier.epage4031en_US
dc.identifier.isiWOS:000300187000049-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLi, W=54793182900en_US
dc.identifier.scopusauthoridBai, Y=55271762300en_US
dc.identifier.scopusauthoridLi, F=35620639500en_US
dc.identifier.scopusauthoridLiu, C=36975975700en_US
dc.identifier.scopusauthoridChan, KY=7406034142en_US
dc.identifier.scopusauthoridFeng, X=55273110400en_US
dc.identifier.scopusauthoridLu, X=7404839077en_US

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