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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, W2 1
Bai, Y2 1
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
2012 SCImago Journal Rankings: 2.382
 
DOIhttp://dx.doi.org/10.1039/c2jm14847a
 
ReferencesReferences in Scopus
 
DC FieldValue
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
2012 SCImago Journal Rankings: 2.382
 
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
 
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<contributor.author>Bai, Y</contributor.author>
<contributor.author>Li, F</contributor.author>
<contributor.author>Liu, C</contributor.author>
<contributor.author>Chan, KY</contributor.author>
<contributor.author>Feng, X</contributor.author>
<contributor.author>Lu, X</contributor.author>
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<description.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. &#169; 2012 The Royal Society of Chemistry.</description.abstract>
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Author Affiliations
  1. Nanjing University of Technology
  2. The University of Hong Kong