New progress in the study of Cu catalysts for the stabilization of defective graphene at atomic level

Recently, researcher Liu Hongyang and doctoral candidate Huang Fei from the joint research department of Shenyang National Research Center for materials science, Institute of metals, Chinese Academy of Sciences, cooperated with Professor Martin of Peking University, researcher Jiang Zheng of Shanghai Institute of Applied Physics, Chinese Academy of Sciences and Professor Wang Ning of Hong Kong University of science and technology to stabilize the atomic dispersion of defective nano graphene New progress has been made in the study of Cu catalyst for efficient selective hydrogenation of acetylene Relevant research results were published online in nature communications (DOI: 10.1038 / s41467-019-12460-7) Selective hydrogenation of acetylene is one of the important catalytic reactions in the industrial production of polymer How to selectively hydrogenation acetylene to ethylene and avoid further hydrogenation of ethylene to ethane is the main problem to be solved urgently In recent years, Liu Hongyang, a researcher, led his team to study the metal catalysts supported on new carbon nano materials In previous research results, the team found that Pd catalyst with stable atom level dispersed unit point of defective nano graphene showed excellent catalytic activity and selectivity in acetylene semi hydrogenation (j.am.chem.soc 2018, 140, 13142) For the first time, the atom level dispersed unit point Cu was anchored on the defect rich nano graphene carrier (Cu1 / nd @ g), which was characterized by means of spherical difference electron microscopy and X-ray absorption spectroscopy Copper atoms dispersed at the atomic level are bonded to three carbon atoms on the carrier defects, and then stabilized at the carbon defect site of graphene Compared with the traditional cluster Cu catalyst (Cu n / nd @ g), the atom level dispersed Cu 1 / nd @ g catalyst has significant catalytic activity for acetylene hydrogenation and ethylene selectivity Compared with the cluster Cu catalyst (Cu n / nd @ g), the atom dispersed Cu 1 / nd @ G can effectively promote the activation of acetylene and the dissociation of ethylene in the hydrogenation of acetylene In this work, the author successfully expanded the high selectivity catalyst of acetylene from noble metal Pd catalyst to cheap non noble metal Cu catalyst, which laid a solid foundation for the design and development of high activity, high stability and low cost industrial hydrogenation catalyst in the future The above work has obtained the key fund of the major research plan of the National Fund Committee, the cultivation project of the major research plan of the National Fund Committee, the general project of the National Fund Committee, and the key R & D plan of the Ministry of science and technology "nano project" Support from young scientists program, youth Promotion Association of Chinese Academy of Sciences, metal Institute of Chinese Academy of Sciences, Shenyang National Research Center for materials science, and strong support from Shanghai synchrotron radiation source.