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Au deposited on CeO2 prepared by a nanocasting route: A high activity catalyst for CO oxidation

AuthorsLópez Sebastián, José Manuel CSIC ORCID ; Arenal, Raúl CSIC ORCID; Puértolas Lacambra, Begoña CSIC ORCID; Mayoral, Álvaro CSIC ORCID; Taylor, Stuart H.; Solsona, Benjamín CSIC ORCID; García Martínez, Tomás CSIC ORCID
KeywordsCatalytic combustion
Carbon monoxide
Mesoporous CeO2
Gold nanoparticles
Issue Date12-Jul-2014
CitationJournal of Catalysis 317: 167-175 (2014)
AbstractA set of catalysts comprised of gold on different CeO2 supports has been prepared by a nanocasting route and characterized by several physicochemical techniques. These catalysts have been tested for CO oxidation and show outstanding catalytic activity. Higher calcination temperatures of the hard template, producing a poorly ordered silica template, have led to a higher amount of oxygen vacancies on the surface of CeO2. The presence of surface oxygen defects in the support combined with the deposition of Au nanoparticles (ca. 3 nm) homogeneously dispersed on the CeO2 support may explain the excellent behaviour for low temperature CO oxidation. Surprisingly, it has been observed that the degree of inverse replication of the template is not relevant in the catalytic performance, as in all cases neither the characteristics of the ceria surface nor the dispersion and oxidation state of gold are greatly modified by the formation of inter-particle bridges.
Description13 figures, 4 tables.-- Supplementary information available.-- © 2014. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Publisher version (URL)
Identifiersdoi: 10.1016/j.jcat.2014.06.021
e-issn: 1090-2694
issn: 0021-9517
Appears in Collections:(ICB) Artículos
(INMA) Artículos

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