Interaction of Hydrogen with Cu–Zn Mixed Oxide Model Methanol Synthesis Catalyst
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169
|
| Output data |
Year: 2013,
Volume: 373,
Pages: 151-160
Pages count
: 10
DOI:
10.1016/j.molcata.2013.03.014
|
| Tags |
Copper reduction, Copper-zinc oxide catalyst, Hydrogen absorption, In situ FTIR, Inelastic neutron scattering |
| Authors |
Khassin Alexander A.
1
,
Jobic Herve
3
,
Filonenko Georgiy A.
1,2
,
Dokuchits Evgeniy V.
1,2
,
Khasin Alexander V.
1
,
Minyukova Tatyana P.
1,2
,
Shtertser Natalia V.
1
,
Plyasova Lyudmila M.
1
,
Yurieva Tamara M.
1
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
Novosibirsk State University
|
| 3 |
Institute of Researches on Catalysis and Environment in Lyon
|
|
Funding (1)
|
1
|
Institut Laue Langevin
|
ILL 7-05-310
|
Interaction of hydrogen with model Cu–Zn methanol synthesis catalyst prepared by decomposition of mixed hydroxicarbonate is studied by inelastic neutron scattering, in situ FTIR/MS, and thermal analysis. Reduced (Cu0.08,Zn0.92)O mixed oxide accumulates 6H/Cu, mainly as hydride, hydroxyl and formate species. The reduction of copper in the (Cu,Zn)O mixed oxide occurs via a reversible redox interaction with H2 and absorption of protons as OH−-groups with ν = 3250 cm−1 and δ ≈ 1430–1480 cm−1. Kinetic and thermodynamic parameters of this process are evaluated. The weight loss during the reduction is due to the decomposition of the residual carbonate groups to CO2 via formate intermediates, which occurs in the presence of hydrogen. Exposure of (Cu,Zn)O to air prior to the reduction strongly affects the kinetic parameters of the reduction process.