Ultrafine nano-copper derived from dopamine polymerization&synchronous adsorption achieve electrochemical purification of nitrate to ammonia in complex water environments  

作　　者：Xue Zhao Mengshan Chen Dan Wang Haoran Zhang Guangzhi Hu Yingtang Zhou 

机构地区：[1]Faculty of Chemistry and Chemical Engineering,Yunnan Normal University,Kunming 650092,China [2]National Engineering Research Center for Marine Aquaculture,Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316004,China [3]College of Chemistry Nankai University,Nankai University,Tianjing 300071,China [4]Institute for Ecological Research and Pollution Control of Plateau Lakes,School of Ecology and Environmental Science,Yunnan University,Kunming 650504,China

出　　处：《Chinese Chemical Letters》2024年第8期383-390,共8页中国化学快报（英文版）

基　　金：supported by the Zhejiang Province Key Research and Development Project(No.2023C01191);the Construction of the Scientific Research Platform of Yunnan Normal University(No.01100205020503202);the“Union University Innovation Team”of Yunnan Normal University(No.01100205020503209);the“Spring City Plan:the High-level Talent Promotion and Training Project of Kunming(No.2022SCP005)”.

摘　　要：Electrochemical-nitrate-reduction-reaction(eNitRR)synthesis of ammonia is an effective way to treat ni-trate wastewater and alleviate the pressure of the Haber-Bosch ammonia production industry.How to develop effective catalysts to electrochemically reduce nitrate to ammonia and purify sewage under com-plex environmental conditions is the focus of current research.Herein,the dopamine polymerization pro-cess and the[(C_(12)H_(8)N_(2))_(2)Cu]^(2+)complex embedding process were run simultaneously in time and space,and ultrafine Cu nanoparticles(Cu/CN)were effectively loaded on nitrogen-doped carbon after heat treat-ment.Using Cu/CN as the catalyst,the ammonia yield rate and Faradaic efficiency of the electrochemical conversion of NO_(3)^(-)to NH_(3)are highly 8984.0μg h^(−1)mg cat.^(−1)and 95.6%,respectively.Even in the face of complex water environments,such as neutral media,acidic media,coexisting ions,and actual nitrate wastewater,nitrate wastewater can be effectively purified to form high value-added ammonia.The strat-egy of simultaneous embedding increases the exposure rate of Cu sites,and the support of CN is also beneficial to reduce the energy barrier of ^(∗)NO_(3)activation.This study rationally designed catalysts that are beneficial to eNitRR,and considered the situation faced by practical applications during the research stage,reducing the performance gap between laboratory exploration and industrial applications.

关 键 词：Electrochemical nitrate reduction reaction Synthetic ammonia Sewage treatment Nano copper DOPAMINE 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] TQ113.2[理学—化学]