Efficient Direct Decomposition of NO over La0.8A0.2NiO3 (A=K, Ba, Y) Catalysts under Microwave Irradiation
La 0.8 A 0.2 NiO 3 (A=K, Ba, Y) catalysts supported on the microwave-absorbing ceramic heating carrier were prepared by the sol-gel method. The crystalline phase and the catalytic activity of the La 0.8 A 0.2 NiO 3 catalysts were characterized by XRD and H 2 temperature-programmed reduction (TPR). T...
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Published in | Journal of Wuhan University of Technology. Materials science edition Vol. 39; no. 1; pp. 17 - 23 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Wuhan
Wuhan University of Technology
01.02.2024
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | La
0.8
A
0.2
NiO
3
(A=K, Ba, Y) catalysts supported on the microwave-absorbing ceramic heating carrier were prepared by the sol-gel method. The crystalline phase and the catalytic activity of the La
0.8
A
0.2
NiO
3
catalysts were characterized by XRD and H
2
temperature-programmed reduction (TPR). The effects of reaction temperature, oxygen concentration, and gas flow rate on the direct decomposition of nitric oxide over the synthesized catalysts were studied under microwave irradiation (2.45 GHz). The XRD results indicated that the La
0.8
A
0.2
NiO
3
catalysts formed an ABO
3
perovskite structure, and the H
2
-TPR results revealed that the relative reducibility of the catalysts increased in the order of La
0.8
K
0.2
NiO
3
> La
0.8
Ba
0.2
NiO
3
> La
0.8
Y
0.2
NiO
3
. Under microwave irradiation, the highest NO conversion amounted to 98.9%, which was obtained with the La
0.8
K
0.2
NiO
3
catalyst at 400 °C. The oxygen concentration did not inhibit the NO decomposition on the La
0.8
A
0.2
NiO
3
catalysts, thus the N
2
selectivity exceeded 99.8% under excess oxygen at 550 °C. The NO conversion of the La
0.8
A
0.2
NiO
3
catalysts decreased linearly with the increase in the gas flow rate. |
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ISSN: | 1000-2413 1993-0437 |
DOI: | 10.1007/s11595-024-2849-y |