期刊
ACS CATALYSIS
卷 12, 期 8, 页码 4402-4414出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.2c00476
关键词
surface reducibility; metal dispersion; facet control; doping; water-gas shift reaction; cerium oxide
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2016R1A5A1009592, NRF-2021R1A2C3004019, NRF-2019M3D1A1079309, NRF-2021R1A2C2006713, NRF-2020R1A5A1019631, NRF-2021RIS-003]
- Technology Innovation Program by the Ministry of Trade, Industry, and Energy (MOTIE) [20012971, 20010853]
In this study, the activity and selectivity of oxide-supported metal catalysts were enhanced by controlling the catalyst's facet and doping methods. The WGSR activity of Pd supported on Cu-doped CeO2 (CDC) was found to synergistically increase, exceeding the sum of the effects of morphology and Cu doping. The effect of each tuning method on the activity was further investigated from a mechanistic perspective.
For oxide-supported metal catalysts, support reducibilityand metal dispersion are the key factors to determine the activity andselectivity in many essential reactions involving redox process. Herein, wetuned the exposed surface atoms of the catalyst by facet control anddoping methods, which were simultaneously applied to boost thereducibility and metal dispersion of an oxide support. Pd supported onCu-doped CeO2(Pd/CDC) for water-gas shift reaction (WGSR) wasconsidered a model system; Cu was doped into the cubic and octahedralCeO2enclosed with (100) and (111) facets, respectively. By a systematiccombination of density functional theory calculations and experimentalanalyses, the WGSR activity of the Pd/CDC cube was verified tosynergistically increase by more than just the sum of the morphology andCu doping effects. The effect of each tuning method on the activity wasfurther investigated from a mechanistic perspective. This work presents arational design knowledge to enhance the catalytic activity that can be extended to a wide range of supported metal systems
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据