Gold Catalysts Supported on Nanostructured Ce–Al–O Mixed Oxides Prepared by Organic Sol–Gel | Sciact - CRIS-система Института катализа

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

Журнал

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

Вых. Данные

Год: 2012, Том: 115-116, Страницы: 117-128 Страниц : 12 DOI: 10.1016/j.apcatb.2011.12.010

Ключевые слова

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

Авторы

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

Организации

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

Информация о финансировании (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 CAPlusCA OpenAlex

Поступила в редакцию:	22 июл. 2011 г.
Принята к публикации:	5 дек. 2011 г.
Опубликована online:	13 дек. 2011 г.
Опубликована в печати:	1 апр. 2012 г.

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

БД	Цитирований
Web of science	36
Scopus	41
РИНЦ	41
OpenAlex	35