催化作用
纳米晶
氧化物
材料科学
过渡金属
氧气
纳米技术
表面工程
金属
氧化还原
化学物理
化学工程
化学
冶金
生物化学
有机化学
工程类
作者
Yifan Sun,Tao Wu,Zhenghong Bao,Jisue Moon,Zhennan Huang,Zitao Chen,Hao Chen,Meijia Li,Zhenzhen Yang,Miaofang Chi,Todd J. Toops,Zili Wu,De‐en Jiang,Jue Liu,Sheng Dai
出处
期刊:ACS central science
[American Chemical Society]
日期:2022-06-16
卷期号:8 (8): 1081-1090
被引量:25
标识
DOI:10.1021/acscentsci.2c00340
摘要
Introducing transition-metal components to ceria (CeO2) is important to tailor the surface redox properties for a broad scope of applications. The emergence of high-entropy oxides (HEOs) has brought transformative opportunities for oxygen defect engineering in ceria yet has been hindered by the difficulty in controllably introducing transition metals to the bulk lattice of ceria. Here, we report the fabrication of ceria-based nanocrystals with surface-confined atomic HEO layers for enhanced catalysis. The increased covalency of the transition-metal-oxygen bonds at the HEO-CeO2 interface promotes the formation of surface oxygen vacancies, enabling efficient oxygen activation and replenishment for enhanced CO oxidation capabilities. Understanding the structural heterogeneity involving bulk and surface oxygen defects in nanostructured HEOs provides useful insights into rational design of atomically precise metal oxides, whose increased compositional and structural complexities give rise to expanded functionalities.
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