文献类型：期刊文献

英文题名：Highly efficient propyne semihydrogenation over tin-modified Co-based intermetallic catalyst

作者：Bian, Ziqi[1];Chen, Minhao[1];Ge, Xiaohu[1];Zhu, Ningchao[1];Cao, Yueqiang[1];Jiang, Hao[2];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, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai, Peoples R China

年份：2025

卷号：71

期号：5

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20250717861063);WOS:【SCI-EXPANDED(收录号:WOS:001419128700001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503804), the Natural Science Foundation of China (22332003, 22478106, and 22408097), Shanghai Rising-Star Program (23QA1401900), the Shanghai Science and Technology Innovation Action Plan (22JC1403800), the Program of Shanghai Academic/Technology Research Leader (21XD1421000), 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, 13SSW and User Experiment Assist System of SSRF.

语种：英文

外文关键词：adsorption behavior; Co-Sn intermetallic; propylene selectivity; propyne semihydrogenation; site isolation

摘要：Designing and fabricating uniformly dispersed non-precious metal active sites with tuned geometric configurations and local coordination environments for the selective conversion of functional groups to desired products is of great importance but remains challenging in industrial catalytic processes. In this work, we propose a straightforward method for synthesizing the Co3Sn2 intermetallic catalyst through the structural conversion of layered double hydroxide precursors, thereby constructing suitable Sn-modified Co active sites and an optimized catalytic environment for propyne semihydrogenation. Characterizations using x-ray diffraction, high-resolution transmission electron microscopy, and x-ray absorption spectroscopy characterizations are combined to identify the formation of P63/mmc Co3Sn2 intermetallic phase. Catalytic performance tests show that the Co3Sn2 catalyst achieves 95.0% propylene selectivity with nearly complete propyne conversion. Temperature-programmed surface reaction and desorption measurements combined with theoretical calculations demonstrate that the good selectivity is driven by the facile desorption of propylene from Sn-modified Co sites rather than its further hydrogenation.