Selective Semihydrogenation of Alkynes on Shape-Controlled Palladium Nanocrystals
作者:Jooyoung Chung、Chanhoi Kim、Hansaem Jeong、Taekyung Yu、Do Huy Binh、Jyongsik Jang、Jaichan Lee、B. Moon Kim、Byungkwon Lim
DOI:10.1002/asia.201201166
日期:2013.5
selective semihydrogenation of alkynes to alkenes on shape‐controlled palladium (Pd) nanocrystals was performed. Pd nanocrystals with a cubic shape and thus exposed 100} facets were synthesized in an aqueous solution through the reduction of Na2PdCl4 with L‐ascorbic acid in the presence of bromide ions. The Pd nanocubes were tested as catalysts for the semihydrogenation of various alkynes such as 5‐decyne
对形状受控的钯(Pd)纳米晶体上炔烃选择性半氢化为烯烃进行了系统的研究。通过用L还原Na 2 PdCl 4,在水溶液中合成了立方形状的Pd纳米晶体,从而暴露了100}晶面。溴离子存在时的抗坏血酸。Pd纳米立方体已作为催化剂用于各种炔烃的半氢化反应,如5-癸炔,2-丁炔-1,4-二醇和苯乙炔。对于所有底物,Pd纳米立方体均比商用Pd / C催化剂(75-90%)表现出更高的烯烃选择性(> 90%),这归因于100}上的碳-碳三键的巨大吸附能Pd纳米立方体的各个方面。我们基于Pd纳米晶体形状控制的方法为开发用于炔烃半加氢的高选择性催化剂提供了一条简单有效的途径。