Effect of structure and composition on the CO2 hydrogenation properties over bimodal mesoporous CeCo composite catalyst
发布时间：2024-12-01
点击次数：
- 影响因子：
- 13.273
- DOI码：
- 10.1016/j.cej.2019.122023
- 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：
- Chemical Engineering Journal
- 项目来源：
- 重庆市科技局
- 关键字：
- CeCo composite catalyst；Bimodal mesoporous；Surface oxygen vacancy；Synergistic effect；CO2 catalytic hydrogenation
- 摘要：
- The CeO2-δ and CeCo composite catalysts with different Ce/Co mole ratio were prepared by hard-template method for CO2 catalytic hydrogenation. The physical and chemical properties of these catalysts were characterized by H2-TPR, XRD, BET, TEM, ICP, and in-situ XPS. The characterization results indicated that the Co ions can be dissolved into the CeO2 lattice to form Ce-O-Co solid solution, which promotes the reduction of corresponding precursor to form Co active species, surface oxygen vacancies, and the Ce3+-□-Co0 structure. The pore structure of the CeCo composite catalysts can be affected by the Ce/Co mole ratio, and the bimodal mesoporous structure can be obtained at relative high Ce/Co mole ratio. The synergistic effect from ordered bimodal mesoporous structure, surface oxygen vacancies, and metallic Co active species can effectively promote CO2 hydrogenation reaction. The CeCo05 composite catalyst with Ce/Co mole ratio of 0.5 exhibited superior CO2 hydrogenation catalytic activity and high stability, the CO2 catalytic hydrogenation reaction rate and CH4 selectivity reached 4.10 × 10−5 mol/gcat/s and 93.3% at 400 °C, respectively. This work indicated that the CeCo composite catalyst is a promising candidate for CO2 hydrogenation reaction.
- 第一作者：
- Shiyu Xu
- 合写作者：
- Fengqiong Xie,Hongmei Xie
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 375
- 页面范围：
- 122023
- 是否译文：
- 否
- 发表时间：
- 2019-11-01
- 收录刊物：
- SCI