Impact Factor:

7.2

DOI number:

10.1016/j.ijhydene.2023.04.107

Affiliation of Author(s):

重庆工商大学

Teaching and Research Group:

化学工程系/催化理论与应用技术重庆高校市级重点实验室

Journal:

international journal of hydrogen energy

Funded by:

催化理论与应用技术重庆高校市级重点实验室，重庆市科技局

Key Words:

Mesoporous Co/CeO2-d catalyst；Active cente；rOxygen vacancy；Interface structure；CO2 catalytic hydrogenation

Abstract:

The surface active centers, which include metal Co, surface oxygen vacancies, and Co0–CeO2-δ interface structures, can be constructed on the mesoporous Co/CeO2-δ catalysts by wet impregnation method. And the surface active centers can be regulated by the Co species dosage. The interaction between the metal Co and CeO2-δ can promote surface oxygen vacancies and Co0–CeO2-δ interface structures to be formed and be conducive to inhibit the aggregation and sintering of Co species in high temperature environment. The prepared Co/CeO2-δ catalysts have better catalytic performances for CO2 hydrogenation than the single component Co and CeO2-δ catalysts, which can be attributed to the synergistic effect between Co0 active centers, surface oxygen vacancies, and Co0–CeO2-δ interface structures. Therefore, the Co/CeO2-δ catalysts have strong adsorption and activation ability for reactant CO2 and H2 molecules to improve the CO2 hydrogenation activity. At atmospheric pressure and 400 °C, the CO2 conversion and CH4 selectivity on the Co/CeO2-δ catalyst with Co loading of 12% could reach 59.7% and 95.7%, respectively, and maintained good stability in 9 cycles for CO2 hydrogenation reaction.

First Author:

Guilin Zhou

Co-author:

赵珊,谢凤琼,Chen Shuang,XHM

Indexed by:

源刊论文

Correspondence Author:

周桂林

Document Code:

RVED5HC9BJX8EQX03GTQOOGYQ61J5G4V

Discipline:

Engineering

Document Type:

Journal Article

Volume:

74

Issue:

48

Page Number:

28980–28997

Translation or Not:

no

Date of Publication:

2023-08-29

Links to published journals:

https://doi.org/10.1016/j.ijhydene.2023.04.107