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

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外文摘要：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[(C12H8N2)2Cu]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 NO3 to NH3 are highly 8984.0 μg h-1 mgcat.-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*NO3 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.

外文关键词：

Electrochemical nitrate reduction reactionSynthetic ammoniaSewage treatmentNano copperDopamine

作者：

Xue Zhao、Mengshan Chen、Dan Wang、Haoran Zhang、Guangzhi Hu、Yingtang Zhou

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作者单位：

Faculty of Chemistry and Chemical Engineering,Yunnan Normal University,Kunming 650092,China

National Engineering Research Center for Marine Aquaculture,Marine Science and Technology College,Zhejiang Ocean University,Zhoushan 316004,China

College of Chemistry Nankai University,Nankai University,Tianjing 300071,China

Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science,Yunnan University,Kunming 650504,China

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出版年：

2024

DOI：

10.1016/j.cclet.2023.109327

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(8)