Planar Defect of the Nano-Structured Zinc Oxide as the Site for Stabilization of the Copper Active Species in Cu/ZnO Catalysts
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Conference |
CO-ordination of Nanostructured Catalytic Oxides Research and Development in Europe : 1st Conference of the European Union Coordination Action
26-28 Jan 2005
,
Louvain-la-Neuve
|
| Journal |
Catalysis Today
ISSN: 0920-5861
, E-ISSN: 1873-4308
|
| Output data |
Year: 2006,
Volume: 112,
Pages: 143-147
Pages count
: 5
DOI:
10.1016/j.cattod.2005.11.047
|
| Tags |
Cu/ZnO catalyst, EXAFS spectroscopy, High-resolution electron microscopy, Methanol synthesis, Planar defect in oxides |
| Authors |
Khassin Alexander A.
1
,
Pelipenko Vladimir V.
1
,
Minyukova Tatyana P.
1
,
Zaikovskii Vladimir I.
1
,
Kochubey Dmitrii I.
1
,
Yurieva Tamara M.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, 5, Pr. Lavrentieva, Novosibirsk 630090, Russia
|
|
Funding (2)
|
1
|
Netherlands Organisation for Scientific Research
|
047.015.004
|
|
2
|
Russian Science Support Foundation
|
|
The catalytic activity of CuZn catalysts in the synthesis of methanol is related to those reduced Cu species, which originate from the CuxZn1−xO solid solution of wurtzite-like structure. Copper cations in the CuxZn1−xO solid solution are localized in the extended stacking faults of the ZnO lattice. Copper sites could be supposedly described as the product of introducing (OH)⋯Cu⋯(OH) to the planar defects of zinc oxide structure. Hydroxyl groups stabilize the planar defects of ZnO. The process of the samples reduction leads to the formation of flat Cu0 particles over the surface of zinc oxide. The planar defects of ZnO structure are preserved in the reduced state. During the reoxidation, copper atoms return back to the extended stacking faults of ZnO as the tape-like clusters of flat-square coordinated copper cations.