New progress in CO 2 transformation research by Dalian Institute of chemical and physical sciences and Nanyang University of Technology

Recently, Huang Yanqiang, researcher and Zhang Tao, academician team of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, cooperated with Professor Liu Bin, Nanyang University of technology, Singapore, to develop a nitrogen doped graphene anchored Ni monoatomic catalyst, which can be used as an efficient electrocatalytic agent for carbon dioxide reduction Relevant work was published in nature energy in the form of CO correspondents（ Nature Energy , 2018 , 3 , 140-147）。 The source of catalytic reduction of carbon dioxide by Ni monoatomic catalyst: electrochemical reduction of carbon dioxide by Dalian Institute of chemistry, Chinese Academy of Sciences is an effective way to achieve carbon resource recycling It is important to design excellent catalysts to reduce the overpotential and improve the selectivity and stability of the reaction The structure of the active center of the single atom catalyst is clear, and the electronic structure of the center metal depends on the interaction between the neighboring coordination atoms, which can show similar properties to the homogeneous catalyst, and thus is expected to achieve the efficient activation and directional transformation of CO2 molecules Therefore, the monoatomic catalysts show great potential in the electrochemical reduction of CO 2 Structure characterization of N-doped graphene anchored Ni monoatomic catalyst source: nature energy the team prepared a n-doped graphene anchored Ni monoatomic catalyst by pyrolyzing the mixture of nitrogen, carbon organic matter and Ni salt at high temperature It was proved by various characterization methods that Ni coordinated with four pyridine nitrogen and formed ni-n 4 structure Among them, Ni is + 1 valence, and the outermost electronic structure is 3D 9 arrangement; the outermost 3D unpaired electrons of Ni (I) single atom are easy to be delocalized, which can make some electrons delocalized from ni3d x2-y2 orbit, form a covalent bond with 2p orbit of adsorbed CO2 molecule, and finally form a negatively charged ni-co2 δ - structure, thus realizing the efficient activation of CO2 molecule Ni single atom catalyst showed excellent catalytic performance in the electrochemical reduction of CO 2: under 0.6V over potential, the specific current of 350 a / g and the conversion frequency of 14800h-1 were achieved, and the conversion efficiency of CO was 97% After continuous reaction for 100 hours at current density of 22 MAC m-2, the catalyst maintained 98% of its initial activity The relevant research results provide a new idea for the design of efficient CO 2 electro reduction catalyst The excellent performance of Ni monoatomic catalyst in the electrochemical reduction of CO 2 comes from nature energy, which is supported by the national key research and development plan, the strategic leading science and technology project of Chinese Academy of Sciences and the collaborative innovation center of energy materials chemistry of the Ministry of education (article / figure Huang Yanqiang) paper link: https://www.nature.com/articles/s41560-017-0078-8 communication Author: brief introduction of researcher Huang Yanqiang: http://sourcedb.dicp.cas.cn/zw/zjrck/201706/t20170602_.html brief introduction of researcher Zhang Tao: http://sourcedb.dicp.cas.cn/zw/zjrck/200908/t20090820_.html brief introduction of Professor Liu Bin, academician Zhang Tao: Http://research.ntu.edu.sg/expertise/academicprofile/pages/staffprofile.aspx? St ˊ email = Liubin & categorydescription = Energy Professor Liu Bin