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

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TitleCore-shell TiO 2/C nanofibers as supports for electrocatalytic and synergistic photoelectrocatalytic oxidation of methanol
AuthorsLi, W1 2
Bai, Y1 2
Li, F2
Liu, C1
Chan, KY2
Feng, X1
Lu, X1
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
CitationJournal Of Materials Chemistry, 2012, v. 22 n. 9, p. 4025-4031 [How to Cite?]
DOI: http://dx.doi.org/10.1039/c2jm14847a
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.
ISSN0959-9428
2011 Impact Factor: 5.968
2011 SCImago Journal Rankings: 0.496
DOIhttp://dx.doi.org/10.1039/c2jm14847a
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorLi, W
dc.contributor.authorBai, Y
dc.contributor.authorLi, F
dc.contributor.authorLiu, C
dc.contributor.authorChan, KY
dc.contributor.authorFeng, X
dc.contributor.authorLu, X
dc.date.accessioned2012-10-08T03:23:53Z
dc.date.available2012-10-08T03:23:53Z
dc.date.issued2012
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.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationJournal Of Materials Chemistry, 2012, v. 22 n. 9, p. 4025-4031 [How to Cite?]
DOI: http://dx.doi.org/10.1039/c2jm14847a
dc.identifier.doihttp://dx.doi.org/10.1039/c2jm14847a
dc.identifier.epage4031
dc.identifier.hkuros203305
dc.identifier.issn0959-9428
2011 Impact Factor: 5.968
2011 SCImago Journal Rankings: 0.496
dc.identifier.issue9
dc.identifier.scopuseid_2-s2.0-84863121153
dc.identifier.spage4025
dc.identifier.urihttp://hdl.handle.net/10722/168643
dc.identifier.volume22
dc.languageeng
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp
dc.publisher.placeUnited Kingdom
dc.relation.ispartofJournal of Materials Chemistry
dc.relation.referencesReferences in Scopus
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 methanol
dc.typeArticle
Author Affiliations
  1. Nanjing University of Technology
  2. The University of Hong Kong