Construction of surface active centers on the mesoporous Co/CeO2-δ catalysts for CO2 hydrogenation
发布时间：2024-08-19
点击次数：
- 影响因子：
- 7.2
- DOI码：
- 10.1016/j.ijhydene.2023.04.107
- 所属单位：
- 重庆工商大学
- 教研室：
- 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
- 发表刊物：
- international journal of hydrogen energy
- 项目来源：
- 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
- 关键字：
- Mesoporous Co/CeO2-d catalyst；Active cente；rOxygen vacancy；Interface structure；CO2 catalytic hydrogenation
- 摘要：
- 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.
- 第一作者：
- 周桂林
- 合写作者：
- 赵珊,谢凤琼,陈爽,谢红梅
- 论文类型：
- 源刊论文
- 通讯作者：
- 周桂林
- 论文编号：
- RVED5HC9BJX8EQX03GTQOOGYQ61J5G4V
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 74
- 期号：
- 48
- 页面范围：
- 28980–28997
- 是否译文：
- 否
- 发表时间：
- 2023-08-29