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

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 for selective hydrogenation of CO

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, enhancing 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 functional 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 understanding 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.