Engineering the atomic interface of porous ceria nanorod with single palladium atoms for hydrodehalogenation reaction  

作　　者：Zhijun Li Mingyang Zhang Lili Zhang Xiuli Dong Leipeng Leng JHugh Horton Jun Wang 

机构地区：[1]Joint International Research Laboratory of Advanced Chemical Catalytic Materials&Surface Science,College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China [2]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [3]Department of Chemistry,Queens University,Kingston,K7L 3N6,Canada

出　　处：《Nano Research》2022年第2期1338-1346,共9页纳米研究（英文版）

基　　金：the China Postdoctoral Science Foundation(Nos.2019M661247 and 2020T130091);Postdoctoral Science Foundation of Heilongjiang Province(No.LBH-Z19047);Program for Overseas Talents Introduction of Northeast Petroleum University(No.15041260303);Scientific Research Foundation for Returned Scholars of Heilongjiang Province of China(No.719900091).

摘　　要：Tuning the electronic properties of single atom catalysts(SACs)between the central metal and the neighboring surface atoms has emerged as an efficient strategy to boost catalytic efficiency and metal utilization.Here we describe a simple and efficient approach to create atomically dispersed palladium atoms supported over defect-containing porous ceria nanorod containing palladium up to 0.26 wt.%.The existence of singly dispersed palladium atoms is confirmed by spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements.This catalyst shows excellent efficiency in hydrodehalogenation reactions at low H2 pressure under mild conditions,along with satisfactory recyclability and scalability.Density functional theory(DFT)calculations reveal that the high activity stems from the spatial isolation of palladium atoms and the modified electronic structure of palladium confined in defect-containing ceria nanorod.This work may lay the foundation for the facile creation of single atom catalysts within the synthetic community and shed light on the possibility for scale-up production.

关 键 词：heterogeneous catalysis palladium single atom catalyst porous ceria nanorod HYDRODEHALOGENATION catalytic activity 

分 类 号：TB3[一般工业技术—材料科学与工程]