Pd nanoparticles on defective polymer carbon nitride:Enhanced activity and origin for electrocatalytic hydrodechlorination reaction  

作　　者：Song Shu Peng Wang Wendong Zhang Weilu Wang Jianjun Li Yinghao Chu Fusheng Wei Xianming Zhang Guangming Jiang 

机构地区：[1]College of Architecture and Environment,Sichuan University,Chengdu 610065,China [2]Engineering Research Center for Waste Oil Recovery Technology and Equipment,Ministry of Education,Chongqing Technology and Business University,Chongqing 400067,China [3]Chongqing Key Laboratory of Three Gorges Reservoir Area Surface Process and Environmental Remote Sensing,Chongqing Key Laboratory of Inorganic Functional Materials,Chongqing Normal University,Chongqing 401331,China

出　　处：《Chinese Chemical Letters》2020年第10期2762-2768,共7页中国化学快报（英文版）

基　　金：the National Key R&D Program of China(No.2019YFD1100300);National Natural Science Foundation of China(Nos.41877396,51708157);Shenzhen Key Technology R&D Program of China(No.JSGG20180507183210868);the State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(Nos.ES201905,2020TS02);State Key Laboratory of Separation Membranes and Membrane Processes(Tianjin Polytechnic University,No.M2-201701)。

摘　　要：Here we report a facile defect-engineering strategy on the support to optimize the metal-support interaction and enhance the metal’s electrocatalytic hydrodechlo rination perfo rmance in converting 2,4-dichlorophenol(2,4-DCP)to phenol.The specific activity of the Pd nanoparticles(Pd NPs)on defective polymer carbon nitride(Pd/PCN-x)reaches 0.09 min^(-1) m^-2Pd,which is 1.5 times that of the Pd NPs supported on the perfect PCN(Pd/PCN-0).The combined experimental and theoretical results demonstrate that the strong adsorption of phenol on Pd/PCN-0 passivates the active sites,limiting the dechlorination progress.The PCN-x containing-C≡N defects can effectively mediate the spatial configuration and electronic structure of Pd NPs,and promote the preferential adsorption of 2,4-DCP rather than phenol,resulting in an enhanced dechlorination efficiency.

关 键 词：HYDRODECHLORINATION ELECTROCATALYSIS Adsorption properties Metal-support interaction N defects 

分 类 号：TQ243.12[化学工程—有机化工] TQ426