MOF-assisted Synthesis of Dual-atom Palladium Catalysts for Acetylene Semi-hydrogenation  

作　　者：Chen Jie Xu Yuebing Qi Jian Liu Bing Liu Xiaohao 

机构地区：[1]Department of Chemical Engineering,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China [2]State Key Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2024年第3期42-52,共11页中国炼油与石油化工（英文版）

基　　金：the National Natural Science foundation of China(22379053 and 21878127);China Postdoctoral Science Foundation(2022M711358).We also thank Xu Fangping for assistance in HRTEM characterization from the Central Laboratory of School of Chemical and Material Engineering of Jiangnan University.

摘　　要：The selective removal of trace acetylene in ethylene feed gas is of great significance in the petrochemicalindustry;however, there are still challenges in designing and developing high-performance catalysts. Here, a MOFassistedencapsulation strategy was adopted for the precise synthesis of diatomic Pd2 sites on a ZnO support. When usedfor the acetylene semi-hydrogenation reaction, the dual-atom Pd2-ZnO catalyst exhibited improved catalytic performance,achieving complete conversion of acetylene at 125 °C with an 89% selectivity to ethene, as compared to Pd single-atom andnanoparticles. This enhancement was mainly attributed to the catalyst’s ability to dissociate H2 and facilitate the desorptionof intermediate C2H4. Moreover, the strong interaction between the support and the diatomic Pd sites was responsible for thecatalyst’s excellent stability during the long-term reaction.

关 键 词：dual-atom palladium acetylene semi-hydrogenation MOFs hydrogen dissociation intermediate 

分 类 号：TQ221.211[化学工程—有机化工] O643.36[理学—物理化学]