文献类型：期刊文献

英文题名：In situ transformation of Pd to metal-metalloid alloy Pd2B for alkyne semi-hydrogenation

作者：Xu, Shuaiwen[1];Wang, Lei[1];Tian, Pengfei[2];Zhou, Shenghu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：15

期号：9

起止页码：6847

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20251017992280);WOS:【SCI-EXPANDED(收录号:WOS:001435810700001)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Grant No. 22078099, 22178110 and 22378125) and the Basic Research Program of Science and Technology Commission of Shanghai Municipality (Grant No. 22JC1400600). The authors thank these organizations for providing these kind financial supports.

语种：英文

外文关键词：Catalyst selectivity - Manganese alloys - Metal nanoparticles - Nanocatalysts - Sodium alloys

摘要：In this work, we report alumina-supported metal-metalloid alloy nanoparticles (Pd2B/Al2O3) as highly efficient alkyne semi-hydrogenation catalysts. The mentioned catalysts contain orthorhombically distorted hcp Pd2B nanoparticles and were prepared by in situ transformation of Pd/Al2O3 with borane dimethylamine complex by a solvothermal method. The synthesized Pd2B/Al2O3 demonstrated greatly enhanced semi-hydrogenation performance. Under reaction conditions of 30 degrees C, 0.1 MPa of H2 and a substrate/Pd molar ratio of 1000/1, the conversions of 3-hexyne-1-ol could reach 99.8% in 15 min with a yield of cis-3-hexen-1-ol of 93.3%. Importantly, the alkene and cis- to trans-alkene selectivity only slightly decreases with an extended reaction time, showing the inhibition of deep hydrogenation. Experimental studies and density functional theory calculations indicate that the catalytic enhancement is originated from the formation of Pd2B alloy, which alters the electronic and geometric properties of surface species, thus suppressing the deep hydrogenation with the enhanced alkene selectivity.