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Article: Catalytic properties of Pt cluster-decorated CeO2 nanostructures
Title | Catalytic properties of Pt cluster-decorated CeO2 nanostructures |
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Authors | |
Keywords | Catalysis Interface Nanoclusters Nanocrystals |
Issue Date | 2011 |
Citation | Nano Research, 2011, v. 4 n. 1, p. 61-71 How to Cite? |
Abstract | Uniform clusters of Pt have been deposited on the surface of capping-agent-free CeO 2 nanooctahedra and nanorods using electron beam (e-beam) evaporation. The coverage of the Pt nanocluster layer can be controlled by adjusting the e-beam evaporation time. The resulting e-beam evaporated Pt nanocluster layers on the CeO 2 surfaces have a clean surface and clean interface between Pt and CeO 2. Different growth behaviors of Pt on the two types of CeO 2 nanocrystals were observed, with epitaxial growth of Pt on CeO 2 nanooctahedra and random growth of Pt on CeO 2 nanorods. The structures of the Pt clusters on the two different types of CeO 2 nanocrystals have been studied and compared by using them as catalysts for model reactions. The results of hydrogenation reactions clearly showed the clean and similar chemical surface of the Pt clusters in both catalysts. The support-dependent activity of these catalysts was demonstrated by CO oxidation. The Pt/CeO 2 nanorods showed much higher activity compared with Pt/CeO 2 nanooctahedra because of the higher concentration of oxygen vacancies in the CeO 2 nanorods. The structure-dependent selectivity of dehydrogenation reactions indicates that the structures of the Pt on CeO 2 nanorods and nanooctahedra are different. Thes differences arise because the metal deposition behaviors are modulated by the strong metal-metal oxide interactions. © 2011 Tsinghua University Press and Springer-Verlag Berlin Heidelberg. |
Persistent Identifier | http://hdl.handle.net/10722/169605 |
ISSN | 2023 Impact Factor: 9.5 2023 SCImago Journal Rankings: 2.539 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lin, F | en_US |
dc.contributor.author | Hoang, DT | en_US |
dc.contributor.author | Tsung, CK | en_US |
dc.contributor.author | Huang, W | en_US |
dc.contributor.author | Lo, SHY | en_US |
dc.contributor.author | Wood, JB | en_US |
dc.contributor.author | Wang, H | en_US |
dc.contributor.author | Tang, J | en_US |
dc.contributor.author | Yang, P | en_US |
dc.date.accessioned | 2012-10-25T04:53:37Z | - |
dc.date.available | 2012-10-25T04:53:37Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Nano Research, 2011, v. 4 n. 1, p. 61-71 | en_US |
dc.identifier.issn | 1998-0124 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/169605 | - |
dc.description.abstract | Uniform clusters of Pt have been deposited on the surface of capping-agent-free CeO 2 nanooctahedra and nanorods using electron beam (e-beam) evaporation. The coverage of the Pt nanocluster layer can be controlled by adjusting the e-beam evaporation time. The resulting e-beam evaporated Pt nanocluster layers on the CeO 2 surfaces have a clean surface and clean interface between Pt and CeO 2. Different growth behaviors of Pt on the two types of CeO 2 nanocrystals were observed, with epitaxial growth of Pt on CeO 2 nanooctahedra and random growth of Pt on CeO 2 nanorods. The structures of the Pt clusters on the two different types of CeO 2 nanocrystals have been studied and compared by using them as catalysts for model reactions. The results of hydrogenation reactions clearly showed the clean and similar chemical surface of the Pt clusters in both catalysts. The support-dependent activity of these catalysts was demonstrated by CO oxidation. The Pt/CeO 2 nanorods showed much higher activity compared with Pt/CeO 2 nanooctahedra because of the higher concentration of oxygen vacancies in the CeO 2 nanorods. The structure-dependent selectivity of dehydrogenation reactions indicates that the structures of the Pt on CeO 2 nanorods and nanooctahedra are different. Thes differences arise because the metal deposition behaviors are modulated by the strong metal-metal oxide interactions. © 2011 Tsinghua University Press and Springer-Verlag Berlin Heidelberg. | en_US |
dc.language | eng | en_US |
dc.relation.ispartof | Nano Research | en_US |
dc.subject | Catalysis | en_US |
dc.subject | Interface | en_US |
dc.subject | Nanoclusters | en_US |
dc.subject | Nanocrystals | en_US |
dc.title | Catalytic properties of Pt cluster-decorated CeO2 nanostructures | en_US |
dc.type | Article | en_US |
dc.identifier.email | Tang, J: jinyao@hku.hk | en_US |
dc.identifier.authority | Tang, J=rp01677 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1007/s12274-010-0042-4 | en_US |
dc.identifier.scopus | eid_2-s2.0-78651515150 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-78651515150&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 4 | en_US |
dc.identifier.issue | 1 | en_US |
dc.identifier.spage | 61 | en_US |
dc.identifier.epage | 71 | en_US |
dc.identifier.isi | WOS:000287973600005 | - |
dc.identifier.scopusauthorid | Lin, F=36801990200 | en_US |
dc.identifier.scopusauthorid | Hoang, DT=36801625700 | en_US |
dc.identifier.scopusauthorid | Tsung, CK=6602491091 | en_US |
dc.identifier.scopusauthorid | Huang, W=7407906424 | en_US |
dc.identifier.scopusauthorid | Lo, SHY=36801957500 | en_US |
dc.identifier.scopusauthorid | Wood, JB=36538308200 | en_US |
dc.identifier.scopusauthorid | Wang, H=36803040100 | en_US |
dc.identifier.scopusauthorid | Tang, J=12791614900 | en_US |
dc.identifier.scopusauthorid | Yang, P=7403931988 | en_US |
dc.identifier.citeulike | 8121604 | - |
dc.identifier.issnl | 1998-0000 | - |