Impact Factor:

3.154

DOI number:

10.1002/cnma.202100533

Affiliation of Author(s):

重庆工商大学

Teaching and Research Group:

化学工程系

Journal:

ChemNanoMat

Funded by:

重庆市教育委员会，重庆市科技局

Key Words:

NiCe composite catalyst；Porous structure；CO2；catalytic hydrogenation

Abstract:

Ni component can be effectively introduced intoCeO2 by a soft template method to prepare porous NiCe composite catalysts. The reducibility of the catalyst precursors was studied by H2-TPR. The physicochemical properties of the prepared NiCe composite catalysts were characterized by XRD, quasi in-situ XPS, BET and TEM. And the catalytic performances of the corresponding NiCe composite catalysts was evaluated by CO2 catalytic hydrogenation. The synergistic effect of Ni and Ce species can significantly improve the reducibility of the precursors to form CO2 hydrogenation active sites in the corresponding NiCe composite catalysts. The morphology, pore structure, specific surface area, crystallinity and content of metal Ni species of the prepared NiCe composite catalysts were significantly affected by nNi/nCe ratio, which can affect the CO2 catalytic hydrogenation performances of NiCe composite catalysts. The synergistic effect of Ni and Ce species can also promote the formation of NiCe composite catalyst nanoparticles with small particle size about 5–10 nm. The developed mesoporous structure and high specific surface area can be formed in the prepared NiCe composite catalysts. The NC3 catalyst with a nNi/nCe ratio of 3.0 showed the best CO2 hydroreduction performances and use stability. When the reaction temperature was 300 °C, the CO2 conversion and CH4 selectivity can reach 85.6% and100%, respectively. Even if the reaction temperature rises to340°C, the CO2 conversion and CH4 selectivity can be maintained at 83.7% and 100% in the continuous reaction of600 min, respectively.

First Author:

Guilin Zhou

Co-author:

徐诗雨,李月,蒋青青,许本静,XHM,ZGZ

Indexed by:

源刊论文

Correspondence Author:

周桂林

Document Code:

FTS7ZZEQXSUE1XAK4Y9GL3FTRF9F8ILS

Discipline:

Engineering

Document Type:

Journal Article

Volume:

8

Issue:

4

Page Number:

e202100533

Translation or Not:

no

Date of Publication:

2022-04-01

Links to published journals:

https://doi.org/10.1002/cnma.202100533