CeCu composite catalyst for CO synthesis by reverse water–gas shift reaction: Effect of Ce/Cu mole ratio
发布时间：2024-10-10
点击次数：
- 影响因子：
- 7.2
- DOI码：
- 10.1016/j.jcou.2017.07.004
- 所属单位：
- 重庆工商大学
- 教研室：
- 材料科学与工程系
- 发表刊物：
- Journal of CO2 Utilization
- 项目来源：
- 重庆市科技局
- 关键字：
- RWGS reaction；CO2；CeCu composite catalyst；CO；Resource utilization
- 摘要：
- 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.
- 第一作者：
- 周桂林
- 合写作者：
- 代必灿,谢红梅,张桂芝,熊昆,郑旭煦
- 论文类型：
- 源刊论文
- 通讯作者：
- 周桂林
- 论文编号：
- DZI8Q0OUFQ7J5IS3ETRWDLZLBXC1E1Q7
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 期号：
- 21
- 页面范围：
- 292–301
- 是否译文：
- 否
- 发表时间：
- 2017-10-01