Research group of Professor Wang Cheng of Xiamen University enhanced co2rr by building pyridine coordination sites with organometallic monolayers

Wang Cheng, Professor, School of chemistry and chemical engineering, Xiamen University, has made progress in the construction of protoporphyrin cobalt and pyridine catalytic sites on metal organic monolayer (mol) for electrocatalytic CO 2 reduction Relevant research results "cooperative stabilization of the [pyredinium-co2-co] addition on a metal – organizational layer enhanceelectrostatic CO2 reduction" were published online in J am Chem SOC (DOI: 10.1021 / JACS 9b09227) As a cocatalyst, pyridine / pyridylhydrogen (py / Pyh +) has been found to be able to be applied to metal and semiconductor electrodes to improve the performance of electrocatalytic CO 2 reduction (CO 2rr) In addition, the catalysts with pyridine sites in N-doped carbon materials also have high CO 2rr performance However, the catalytic mechanism of pyridine / Pyh + is not clear In this study, they modified cobalt protoporphyrin (copp) on the secondary structural unit of metal organic monolayer (mol) and ingeniously utilized the pyridine hydrogen site of copp and mol to catalyze the reduction of CO 2 Combined with in-situ infrared measurement, kinetic experiment, isotope experiment and DFT theoretical calculation, it is proved that pyridine on copp and mol participates in the formation of CO 2 activation intermediate [Pyh + -- O 2 c-copp] The structural characteristics of mols make it possible to design this unique catalytic site Guo Ying and Shi Wenjie, Ph.D students from the school of chemistry and chemical engineering of Xiamen University, were the co first authors of the paper Dr Yang Huijuan and Mr Ye Jinyu helped in the electrochemical and in-situ infrared tests Dr he Quanfeng, Ph.D student, helped to complete the COMSOL simulation Mr Zeng Zhongming, Ph.D student he Xinru and Mr Huang Ruiyun participated in part of the work The research work was supported by the key R & D plan of the Ministry of science and Technology (approval No.: 2016yfa0200702) and the National Natural Science Foundation (approval No.: 21671162, 21721001) and other projects.