XAFS Study of a Au/Al2O3 Catalytic Nanosystem Doped by Ce and Ce-Zr Oxides
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
17th International Synchrotron Radiation Conference
15-20 Jun 2008
,
Новосибирск
|
| Journal |
Nuclear Instruments and Methods in Physics Research Section A
ISSN: 0168-9002
|
| Output data |
Year: 2009,
Volume: 603,
Number: 1-2,
Pages: 185-187
Pages count
: 3
DOI:
10.1016/j.nima.2009.03.004
|
| Tags |
EXAFS, Gold catalytic system, Local structure, Nanoparticle, XANES, XPS, XRD |
| Authors |
Kriventsov V.V.
1
,
Simakova I.L.
1
,
Simakov A.V.
2
,
Smolentseva E.
2
,
Castillon F.
2
,
Estrada M.
3
,
Vargas E.
4
,
Yakimchuk E.P.
1
,
Ivanov D.P.
1
,
Aksenov D.G.
1
,
Andreev D.V.
1
,
Novgorodov B.N.
1
,
Kochubey D.I.
1
,
Fuentes S.
2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
National Autonomous University of Mexico
|
| 3 |
Posgrado en Fisica de Materiales, Centro de Investigación Científico y de Educación Superior de Ensenada
|
| 4 |
National Autonomous University of Mexico
|
|
Funding (8)
|
1
|
Russian Foundation for Basic Research
|
08-03-91758
|
|
2
|
Russian Foundation for Basic Research
|
08-03-92502
|
|
3
|
Russian Foundation for Basic Research
|
09-03-01012
|
|
4
|
Russian Foundation for Basic Research
|
06-03-33005
|
|
5
|
Russian Foundation for Basic Research
|
08-03-01150
|
|
6
|
National Autonomous University of Mexico
|
50547-Q
|
|
7
|
National Autonomous University of Mexico
|
IN 110208
|
|
8
|
National Autonomous University of Mexico
|
IN 120706-3
|
This work is devoted to a structural study of the finely dispersed nanosized gold species supported on nanosized mixed oxides prepared by the sol–gel method. An analysis of the XANES (Au-L3) spectra has revealed mainly Au3+ cations located on the oxide matrix surface in distorted octahedral coordination for the catalysts reduced at 150 °C. For the catalysts reduced at 300 °C, a highly distorted metallic gold species has been mainly found, within the method limitation. The synthesized catalysts have also been characterized by transmission electron microscopy (TEM), BET, X-ray diffraction (XRD) and XPS.