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Article: Nanostructure PtRu/MWNTs as anode catalysts prepared in a vacuum for direct methanol oxidation

TitleNanostructure PtRu/MWNTs as anode catalysts prepared in a vacuum for direct methanol oxidation
Authors
Issue Date2006
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuir
Citation
Langmuir, 2006, v. 22 n. 26, p. 11447-11452 How to Cite?
AbstractPlatinum and ruthenium nanoparticles that are uniformly dispersed on multiwalled carbon nanotubes (MWNTs) were synthesized by vacuum pyrolysis using Pt(acac)2 and Ru(acac)3 as the metal precursors. The resulting nanocomposites were characterized by transmission electron microscopy and X-ray diffraction. The Pt, Pt45Ru55, and Ru nanoparticles had mean diameters of 3.0 ± 0.6, 2.7 ± 0.6, and 2.5 ± 0.4 nm and the same mole number as their metal precursors at 500°C. The electrocatalytic activity of the Pt/MWNTs and PtRu/MWNTs was investigated at room temperature by cyclic voltammetry and chronoamperometry. All of the electrochemical results showed that the PtRu/MWNTs exhibited a high level of catalytic activity for methanol oxidation as a result of the large surface area of the supporting carbon nanotubes and the wide dispersion of the Pt and Ru nanoparticles. Compared with the Pt/MWNTs, the onset potential for methanol oxidation of the PtRu/MWNTs was significantly lower, and the ratio of the forward anodic peak current to the reverse anodic peak current during methanol oxidation was somewhat higher. The Pt45Ru55/MWNTs displayed the best electrocatalytic activity of all of the carbon-nanotube- supported Pt and PtRu catalysts. © 2006 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/69739
ISSN
2015 Impact Factor: 3.993
2015 SCImago Journal Rankings: 1.750
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGu, YJen_HK
dc.contributor.authorWong, WTen_HK
dc.date.accessioned2010-09-06T06:16:24Z-
dc.date.available2010-09-06T06:16:24Z-
dc.date.issued2006en_HK
dc.identifier.citationLangmuir, 2006, v. 22 n. 26, p. 11447-11452en_HK
dc.identifier.issn0743-7463en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69739-
dc.description.abstractPlatinum and ruthenium nanoparticles that are uniformly dispersed on multiwalled carbon nanotubes (MWNTs) were synthesized by vacuum pyrolysis using Pt(acac)2 and Ru(acac)3 as the metal precursors. The resulting nanocomposites were characterized by transmission electron microscopy and X-ray diffraction. The Pt, Pt45Ru55, and Ru nanoparticles had mean diameters of 3.0 ± 0.6, 2.7 ± 0.6, and 2.5 ± 0.4 nm and the same mole number as their metal precursors at 500°C. The electrocatalytic activity of the Pt/MWNTs and PtRu/MWNTs was investigated at room temperature by cyclic voltammetry and chronoamperometry. All of the electrochemical results showed that the PtRu/MWNTs exhibited a high level of catalytic activity for methanol oxidation as a result of the large surface area of the supporting carbon nanotubes and the wide dispersion of the Pt and Ru nanoparticles. Compared with the Pt/MWNTs, the onset potential for methanol oxidation of the PtRu/MWNTs was significantly lower, and the ratio of the forward anodic peak current to the reverse anodic peak current during methanol oxidation was somewhat higher. The Pt45Ru55/MWNTs displayed the best electrocatalytic activity of all of the carbon-nanotube- supported Pt and PtRu catalysts. © 2006 American Chemical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuiren_HK
dc.relation.ispartofLangmuiren_HK
dc.titleNanostructure PtRu/MWNTs as anode catalysts prepared in a vacuum for direct methanol oxidationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0743-7463&volume=22&spage=11447&epage=11452&date=2006&atitle=Nanostructure+PtRu/MWNTs+as+Anode+Catalysts+Prepared+in+a+Vacuum+for+Direct+Methanol+Oxidation+en_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/la062053len_HK
dc.identifier.scopuseid_2-s2.0-33846367706en_HK
dc.identifier.hkuros127616en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33846367706&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume22en_HK
dc.identifier.issue26en_HK
dc.identifier.spage11447en_HK
dc.identifier.epage11452en_HK
dc.identifier.isiWOS:000242771200088-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridGu, YJ=14319095800en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK

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