铜纳米粒子负载于钴纳米片的双金属催化剂催化CO选择性加氢(英文)

Cu nanoclusters supported on Co nanosheets for selective hydrogenation of CO

使用赖氨酸作为表面活性剂模板,合成了Cu纳米粒子负载于Co纳米片的双金属催化剂Cu/Co.与常规的Cu-Co双金属纳米颗粒催化剂相比,Cu/Co催化剂对CO选择性加氢反应表现出特殊的结构效应,提高了CO转化率和高级醇选择性,降低了甲烷选择性.Cu/Co催化剂中,Cu(111)面与Co(100)面相互作用的功能化界面有利于深入研究金属-金属的相互作用.这种双金属催化剂可以将模型催化剂和现实催化应用联系起来,将有助于获得对合成气转化制高级醇反应机理的本质认识.

Cu nanoclusters supported on Co nanosheets(denoted Cu/Co) were prepared using lysine as a surfactant template.The shape of the Cu/Co catalyst promotes selective hydrogenation of CO,en- hancing CO conversion and the selectivity for higher alcohols,and decreasing methane selectivity, which is in marked contrast to current Cu–Co bimetallic nanoparticle catalysts.The distinct func- tional interface of the Cu(111) surface with face-centered cubic structure with the Co(100) surface with hexagonal closed-packed structure in the Cu/Co catalyst provides a breakthrough in under- standing the catalytic nature of metal-metal interactions. The design of this bimetallic catalyst bridges the gap between model catalysts and realistic catalytic applications,and will ultimately allow us to gain a fundamental understanding of the mechanism of syngas conversion to higher alcohols.