文献类型：期刊文献

英文题名：Identification of Intermetallic CoSb as a Cost-Effective and High-Performance Catalyst for Acetylene Semihydrogenation

作者：Ge, Xiaohu[1];Ming, Jinquan[1];Jing, Yundao[1];Fei, Nina[1];Guo, Lingling[2];Cao, Yueqiang[1];Jiang, Hao[3];Zhang, Jing[1];Qian, Gang[1];Zhou, Xinggui[1];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：15

期号：3

起止页码：2282

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20250417766063);WOS:【SCI-EXPANDED(收录号:WOS:001408653700001)】；

基金：This work was funded by the National Key R&D Program of China (2022YFA1503804), the Natural Science Foundation of China (22332003, 22478106, and 22408097), the Shanghai Rising-Star Program (23QA1401900), the Shanghai Science and Technology Innovation Action Plan (22JC1403800), the Program of Shanghai Academic/Technology Research Leader (21XD1421000), the Young Elite Scientists Sponsorship Program by CAST (2023QNRC001), the Fundamental Research Funds for the Central Universities, the China Postdoctoral Science Foundation (2024M760912), and the Postdoctoral Fellowship Program of CPSF under Grant Number GZB20240222. This work was also supported by BL16U1, BL14W1, BL13SSW, and User Experiment Assist System of SSRF.

语种：英文

外文关键词：acetylene semihydrogenation; configuration matching; Co-Sb intermetallic; site isolation; ethylene selectivity

摘要：Designing high-efficiency and cost-effective catalysts for acetylene semihydrogenation holds significance for the production of polymer-grade ethylene in the chemical industry but remains difficult. In this study, we demonstrate an efficient synthesis of the CoSb intermetallic catalyst achieved through the in situ capture of molten Sb by Co, aiming to identify the Co-based catalysts for acetylene semihydrogenation. Combined investigations using X-ray diffraction, aberration-corrected high-resolution scanning transmission electron microscopy, and X-ray absorption spectroscopy demonstrate the presence of the pure CoSb intermetallic phase in the synthesized CoSb catalyst. The CoSb intermetallic catalyst, with a well-defined atomic arrangement and fine-regulated electronic properties, delivers 94.0% ethylene selectivity at similar to 100% acetylene conversion. Temperature-programmed experiments and in situ spectroscopic studies, combined with theoretical calculations, unravel that the good hydrogenation performance arises from the moderate sigma-binding of acetylene and easy desorption of ethylene on the fine-tuned Co active sites by Sb. These insights would be valuable for the creation of high-efficiency catalysts for acetylene semihydrogenation and potentially for other alkynes as well.