A New Type of Strong Metal–Support Interaction and the Production of H through the Transformation of Water on Pt/CeO(111) and Pt/CeO/TiO(110) Catalysts.
The electronic properties of Pt nanoparticles deposited on CeO(111) and CeO/TiO(110) model catalysts have been examined using valence photoemission experiments and density functional theory (DFT) calculations. The valence photoemission and DFT results point to a new type of "strong metal-support int...
| Publicado en: | Journal of the American Chemical Society Vol. 134; no. 21; pp. 8968 - 8975 |
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| Autores principales: | , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
5/30/2012
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=76905814&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 76905814 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 5/30/2012 vid: 134 iid: 21 pid: 997 pub: American Chemical Society artinfo: ui: 76905814 10.1021/ja302070k ppf: 8968 ppct: 7 formats: tig: atl: A New Type of Strong Metal–Support Interaction and the Production of H through the Transformation of Water on Pt/CeO(111) and Pt/CeO/TiO(110) Catalysts. aug: au: Bruix, Albert Rodriguez, José A. Ramírez, Pedro J. Senanayake, Sanjaya D. Evans, Jaime Park, Joon B. Stacchiola, Dario Liu, Ping Hrbek, Jan Illas, Francesc affil: Departament de Química Física and Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Marti i Franques 1, 08028 Barcelona, Spain Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973, United States Facultad de Ciencias, Universidad Central de Venezuela, Caracas 1020-A, Venezuela su: Electric properties of nanoparticles Platinum nanoparticles Cerium oxides Valence (Chemistry) Photoelectron spectroscopy Density functionals Hydrogen production Dissociation (Chemistry) sug: subj: Electric properties of nanoparticles Platinum nanoparticles Cerium oxides Valence (Chemistry) Photoelectron spectroscopy Density functionals Hydrogen production Dissociation (Chemistry) ab: The electronic properties of Pt nanoparticles deposited on CeO(111) and CeO/TiO(110) model catalysts have been examined using valence photoemission experiments and density functional theory (DFT) calculations. The valence photoemission and DFT results point to a new type of "strong metal-support interaction" that produces large electronic perturbations for small Pt particles in contact with ceria and significantly enhances the ability of the admetal to dissociate the O-H bonds in water. When going from Pt(111) to Pt/CeO(111), the dissociation of water becomes a very exothermic process. The ceria-supported Pt appears as a fluxional system that can change geometry and charge distribution to accommodate adsorbates better. In comparison with other water-gas shift (WGS) catalysts [Cu(111), Pt(111), Cu/CeO(111), and Au/CeO(111)], the Pt/CeO(111) surface has the unique property that the admetal is able to dissociate water in an efficient way. Furthermore, for the codeposition of Pt and CeOx nanoparticles on TiO(110), we have found a transfer of O from the ceria to Pt that opens new paths for the WGS process and makes the mixed-metal oxide an extremely active catalyst for the production of hydrogen. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2012 holdings: @attributes: islocal: N |
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