In:
Asia-Pacific Journal of Chemical Engineering, Wiley, Vol. 16, No. 5 ( 2021-09)
Abstract:
A series of x NiCeO y @SiO 2 catalysts with different cerium contents were prepared by hydrothermal coprecipitation and Stöber method. The results of catalytic performance showed that 15NiCeO y @SiO 2 has the best catalytic activity with the methane conversion of 81.1% and the specific activity of the catalyst (the amount of methane converted per mol Ni per minute) of 1.14. 10NiCeO y @SiO 2 exhibits the highest stability, with the methane conversion remaining unchanged within 40 h. Compared with the undoped Ni@SiO 2 catalyst, the enhancement of the activity can be attributed to the reduction of the Ni particle size due to the doping of Ce, which enabled more exposure of active species. Meanwhile, the oxygen vacancies originating from extrinsic defects of ceria increase the reaction rate of activated carbon and CO 2 , inhibit carbon deposition, and accelerate the structure stability.
Type of Medium:
Online Resource
ISSN:
1932-2135
,
1932-2143
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2276947-X
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