Support nanostructure boosts oxygen transfer to catalytically active platinum nanoparticles
Top Cited Papers
- 20 March 2011
- journal article
- Published by Springer Science and Business Media LLC in Nature Materials
- Vol. 10 (4), 310-315
- https://doi.org/10.1038/nmat2976
Abstract
Interactions of metal particles with oxide supports can radically enhance the performance of supported catalysts. At the microscopic level, the details of such metal-oxide interactions usually remain obscure. This study identifies two types of oxidative metal-oxide interaction on well-defined models of technologically important Pt-ceria catalysts: (1) electron transfer from the Pt nanoparticle to the support, and (2) oxygen transfer from ceria to Pt. The electron transfer is favourable on ceria supports, irrespective of their morphology. Remarkably, the oxygen transfer is shown to require the presence of nanostructured ceria in close contact with Pt and, thus, is inherently a nanoscale effect. Our findings enable us to detail the formation mechanism of the catalytically indispensable Pt-O species on ceria and to elucidate the extraordinary structure-activity dependence of ceria-based catalysts in general.Keywords
This publication has 49 references indexed in Scilit:
- In situ spectroscopic detection ofSMSI effect in a Ni/CeO2system: hydrogen-induced burial and dig out of metallic nickelChemical Communications, 2010
- Density-Functional Calculations of the Structure of Near-Surface Oxygen Vacancies and Electron Localization onPhysical Review Letters, 2009
- Chemistry at surfacesChemical Society Reviews, 2008
- A resonant photoelectron spectroscopy study of Sn(Ox) doped CeO2 catalystsSurface and Interface Analysis, 2008
- First-principlesandstudy of cerium oxides: Dependence on the effective U parameterPhysical Review B, 2007
- Oxygen Storage at the Metal/Oxide Interface of Catalyst NanoparticlesAngewandte Chemie, 2005
- The Structure of Catalytically Active Gold on TitaniaScience, 2004
- The surface science of titanium dioxideSurface Science Reports, 2003
- Automotive catalytic converters: current status and some perspectivesCatalysis Today, 2003
- The Effect of Size-Dependent Nanoparticle Energetics on Catalyst SinteringScience, 2002