Reductive Dehydration of Ethano1 to Hydrocarbons on Ni- and Au-Containing Nanocomposites
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Nanotechnologies in Russia
ISSN: 1995-0780
, E-ISSN: 1995-0799
|
| Output data |
Year: 2012,
Volume: 7,
Number: 7-8,
Pages: 327-338
Pages count
: 12
DOI:
10.1134/S199507801204009X
|
| Authors |
Nikolaev S.A.
1
,
Chudakova M.V.
2
,
Chistyakov A.V.
2
,
Kriventsov V.V.
3
,
Tsodikov M.V.
2
|
| Affiliations |
| 1 |
Faculty of Chemistry, Moscow State University, Moscow, 119991 Russia
|
| 2 |
Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninskii pr. 29, Moscow, 119991 Russia
|
| 3 |
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentieva 5, Novosibirsk, 630090 Russia
|
|
Funding (5)
|
1
|
Russian Foundation for Basic Research
|
11-03-00403
|
|
2
|
Russian Foundation for Basic Research
|
12-03-00489
|
|
3
|
Council for Grants of the President of the Russian Federation
|
МК-107.2011.3
|
|
4
|
Council for Grants of the President of the Russian Federation
|
МК-1621.2012.3
|
|
5
|
Council for Grants of the President of the Russian Federation
|
МК-2917.2012.3
|
Monometallic and bimetallic nanocomposites M/Al2O3 (M = NiO, Au, NiO + Au) with metal contents of 0.1–0.65 wt % were prepared by the deposition-precipitation and/or impregnation technique. The surface of the composites was investigated by transmission electron microscopy (TEM), EDX, adsorption spectroscopy (AAS), and XAFS. The features of the M/Al2O3 catalysis of the reductive dehydration of ethanol at 350°C were investigated. The activity of NiO/Al2O3 containing 3.5 nm particles of NiO was 130 h−1. A strong size effect in activity was revealed for Au/Al2O3 nanocomposites with activity increasing from 341 to 1384 h−1 as the size of gold particles decreased from 13–20 to 5 nm. The selectivity of 5-nm particles of Au/Al2O3 to the fraction of C3-C8 hydrocarbons was 11.69 mass %. The growth of M particles due to the segregation of individual metals and/or the formation of mixed (Au + NiO) particles resulted in an increase in the selectivity of C3-C8 up to 34.19 mass %. The causes of the observed catalytic phenomena are discussed considering the reaction mechanisms and the specific structure features of the obtained catalysts.