Impact Factor:

7.2

DOI number:

10.1016/j.jcou.2017.07.004

Affiliation of Author(s):

重庆工商大学

Teaching and Research Group:

材料科学与工程系

Journal:

Journal of CO2 Utilization

Funded by:

重庆市科技局

Key Words:

RWGS reaction；CO2；CeCu composite catalyst；CO；Resource utilization

Abstract:

In this study, CeCu composite catalysts with different Ce/Cu mole ratios were prepared by a hard-template, and their performances in the reverse water–gas shift (RWGS) reaction were investigated. The catalysts were characterized using H2-TPR, XRD, in-situ XPS, AAS, CO2-TPD, and H2-TPD. The characterizations showed that the oxygen vacancies and active Cu0 species as active sites were formed in the CeCu catalysts by the H2 reduction at 400 °C. The synergistic effect of the surface oxygen vacancies and active Cu0 species enhanced catalytic activity of the studied CeCu composite catalysts. The electronic effect between Cu and Ce species boosted the adsorption and activation performances of the reactant CO2 and H2 molecules on the corresponding CeCu catalysts. The Ce1.1Cu1 catalyst demonstrated high stability and the highest CO2 conversion rate in the RWGS reaction, reaching 1.38 mmol gcat−1 min−1 at 400 °C. Its excellent catalytic performance in the RWGS reaction was related to the complete synergistic interaction between the active species via Ce3+-□-Cu0 (□: oxygen vacancy). A CeCu composite material is a superior catalyst for the RWGS reaction because of its high CO2 conversion, 100% CO selectivity, and high stability.

First Author:

Guilin Zhou

Co-author:

代必灿,XHM,ZGZ,XK,郑旭煦

Indexed by:

源刊论文

Correspondence Author:

周桂林

Document Code:

DZI8Q0OUFQ7J5IS3ETRWDLZLBXC1E1Q7

Discipline:

Engineering

Document Type:

Journal Article

Issue:

21

Page Number:

292–301

Translation or Not:

no

Date of Publication:

2017-10-01

Links to published journals:

https://doi.org/10.1016/j.jcou.2017.07.004