Gold Catalysts Supported on Nanostructured Ce–Al–O Mixed Oxides Prepared by Organic Sol–Gel | Sciact - CRIS-system of Boreskov Institute of Catalysis

Gold Catalysts Supported on Nanostructured Ce–Al–O Mixed Oxides Prepared by Organic Sol–Gel Full article

Journal

Applied Catalysis B: Environmental
ISSN: 0926-3373 , E-ISSN: 1873-3883

Output data

Year: 2012, Volume: 115-116, Pages: 117-128 Pages count : 12 DOI: 10.1016/j.apcatb.2011.12.010

Tags

Ceria-alumina, Gold, Mixed oxides, Nanoparticles, Sol-gel, Transient analysis

Authors

Smolentseva Elena ¹ , Simakov Andrey ¹ , Beloshapkin Sergey ² , Estrada Miguel ³ , Vargas Eunice ⁴ , Sobolev Vladimir ⁵ , Kenzhin Roman ⁵ , Fuentes Sergio ¹

Affiliations

1	Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Km. 107 Carretera Tijuana a Ensenada, C.P. 22860, Ensenada, Baja California, Mexico
2	Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
3	Posgrado en Física de Materiales, Centro de Investigación Científico y de Educación Superior de Ensenada, C.P. 22860, Ensenada, B.C., Mexico
4	Posgrado en Ciencias e Ingeniería, Área Nanotecnología, Universidad Autónoma de Baja California, Ensenada, B.C., Mexico
5	Boreskov Institute of Catalysis, C.P. 630090, Novosibirsk, Russia

Funding (3)

1	National Autonomous University of Mexico	50547-Q
2	National Autonomous University of Mexico	IN 224510
3	National Autonomous University of Mexico

Nanostructured ceria–alumina mixed oxides containing different concentrations of ceria (10 and 30 wt.%) were prepared by the sol–gel method using organo-metallic precursors of alumina and ceria. The size of alumina and ceria particles in the prepared Ce–Al–O mixed oxides was smaller than that of pure alumina or ceria. The gold catalysts (3 wt.% Au) supported on ceria–alumina mixed oxides by deposition–precipitation (DP) using HAuCl4 and urea were characterized by several techniques: TEM, XPS and UV–vis spectroscopy, and temperature programmed reduction/oxidation (TPR/TPO). The catalytic activity of prepared Au/CeO2–Al2O3 catalysts in CO oxidation was higher than that of Au/Al2O3 and Au/CeO2 catalysts. Nanostructured ceria incorporated into an alumina matrix has been found quite effective for gold species activation in CO oxidation. In fact, transient analysis of CO oxidation provided an estimate of the relative content of (Au–ceria vacancy) active sites in catalysts. Obtained values are in good agreement with the order of activity for tested samples and gold dispersion according to EXAFS data.

Smolentseva E. , Simakov A. , Beloshapkin S. , Estrada M. , Vargas E. , Sobolev V. , Kenzhin R. , Fuentes S.
Gold Catalysts Supported on Nanostructured Ce–Al–O Mixed Oxides Prepared by Organic Sol–Gel
Applied Catalysis B: Environmental. 2012. V.115-116. P.117-128. DOI: 10.1016/j.apcatb.2011.12.010 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Jul 22, 2011
Accepted:	Dec 5, 2011
Published online:	Dec 13, 2011
Published print:	Apr 1, 2012

Web of science:	WOS:000302429600015
Scopus:	2-s2.0-84855805111
Elibrary:	17973923
Chemical Abstracts:	2012:321744
Chemical Abstracts (print):	156:347864
OpenAlex:	W1997395493

DB	Citing
Web of science	36
Scopus	41
Elibrary	41
OpenAlex	35