Comprehensive Structural Diagnostics of Ni–Ce1–xZrxO2 Catalysts Prepared by the Pechini Method
Full article
| Common |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Journal of Structural Chemistry
ISSN: 0022-4766
, E-ISSN: 1573-8779
|
| Output data |
Year: 2022,
Volume: 63,
Number: 9,
Pages: 1424-1433
Pages count
: 10
DOI:
10.1134/S0022476622090050
|
| Tags |
powder X-ray diffraction; atomic pair distribution function analysis; electron microscopy; solid solutions; catalysts; nickel
cerium dioxide. |
| Authors |
Pakharukova V.P.
1,2
,
Stonkus O.A.
1,2
,
Kharchenko N.A.
1,2
,
Rogozhnikov V.N.
1
,
Gorlova A.M.
1,2
,
Potemkin D.I.
1,2
|
| Affiliations |
| 1 |
Center Boreskov Institute of Catalysis, Novosibirsk, Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, Russia
|
|
Funding (1)
|
1
|
Russian Science Foundation
|
21-73-20075
|
Nickel-containing catalysts Ni/Ce1–xZrxO2 exhibit good activity in the methanation of carbon oxides. The studies devoted to the synthesis and testing of Ni–Ce–Zr–O mixed oxide catalytic systems have been developed in recent years. However, the possibility of preparing solid solutions Ni–Ce–Zr–O is still not clear. In this work, Ni–Ce1–xZrxO2 catalysts are synthesized using the Pechini method that has a proven effectiveness in the preparation of mixed oxides. Structural features of the samples are studied by a wide range of powder diffraction and transmission electron microscopy methods, as well as by the atomic pair distribution analysis. The obtained results prove the possibility of preparing the fluorite-like Ni–Ce–Zr–O substitutional solid solution. The crystal structure of this solution is distorted due to the differences between characteristic coordinations and the radii of nickel, cerium, and zirconium cations. It is shown that the Ni–Ce–Zr–O solid solution with a “strained” defective crystal structure is not stable and decomposes under reducing conditions of methanation of carbon oxides to form fine metallic nickel particles.