Effect of the Microstructure of the Supported Catalysts CuO/TiO2 and CuO/(CeO2-TiO2) on Their Catalytic Properties in Carbon Monoxide Oxidation
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584
, E-ISSN: 1608-3210
|
| Output data |
Year: 2012,
Volume: 53,
Number: 3,
Pages: 409-418
Pages count
: 10
DOI:
10.1134/S0023158412030111
|
| Authors |
Shutilov A.A.
1,2
,
Zenkovets G.A.
1,2
,
Tsybulya S.V.
1,2
,
Gavrilov V.Yu.
1
,
Kryukova G.N.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, 630090 Russia
|
|
Funding (4)
|
1
|
Президиум СО РАН
|
36
|
|
2
|
The Ministry of Education and Science of the Russian Federation
|
16.513.11.3091
|
|
3
|
Council for Grants of the President of the Russian Federation
|
МК-6688.2012.3
|
|
4
|
The Ministry of Education and Science of the Russian Federation
|
2.1.1/729
|
The effect of the microstructure of titanium dioxide on the structure, thermal stability, and catalytic properties of supported CuO/TiO2 and CuO/(CeO2-TiO2) catalysts in CO oxidation was studied. The formation of a nanocrystalline structure was found in the CuO/TiO2 catalysts calcined at 500A degrees C. This nanocrystalline structure consisted of aggregated fine anatase particles about 10 nm in size and interblock boundaries between them, in which Cu2+ ions were stabilized. Heat treatment of this catalyst at 700A degrees C led to a change in its microstructure with the formation of fine CuO particles 2.5-3 nm in size, which were strongly bound to the surface of TiO2 (anatase) with a regular well-ordered crystal structure. In the CuO/(CeO2-TiO2) catalysts, the nanocrystalline structure of anatase was thermally more stable than in the CuO/TiO2 catalyst, and it persisted up to 700A degrees C. The study of the catalytic properties of the resulting catalysts showed that the CuO/(CeO2-TiO2) catalysts with the nanocrystalline structure of anatase were characterized by the high-est activity in CO oxidation to CO2.