文献类型：期刊文献

英文题名：Co-deposition of CuxFey on nickel foam promotes NH3 desorption to enhance nitrate reduction activity and ammonia selectivity

作者：Meng, Guangyuan[1,4];Zhang, Xinwan[1,4];Fu, Wenzhao[1,4];Qiu, Yannan[1,4];Yin, Di[3];Chen, Peng[1,4];Jia, Daqing[1,4];Lu, Zhihao[1,4,6];Zhang, Lehua[1,2,4,5,6]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]Shihezi Univ, Sch Chem & Chem Engn, Shihezi 832003, Xinjiang, Peoples R China;[3]City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong 999077, Peoples R China;[4]East China Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[5]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[6]130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：13

期号：3

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20252018430311);WOS:【SCI-EXPANDED(收录号:WOS:001477608000001)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (22478119) and Xinjiang "Tianchi Talent" Introduction Project.

语种：英文

外文关键词：Electrocatalyst; Nitrate reduction; Electrochemical deposition; Ammonia desorption; Denitrification

摘要：The metal with highly occupied d-orbitals and unclosed d-orbitals shells (Cu, Pd and Pt) was widely used as catalyst in electrochemical NO3 - reduction reaction (NO3-RR), but the production ammonia adsorped on active sites of surface hinders NO3-RR. Herein, a series of CuxFey electrodes (Cu75Fe25, Cu50Fe50 and Cu25Fe75) were prepared through electrochemical co-deposition of Cu and Fe on nickel foam (NF) as a cathode. The CuxFey/NF electrodes showed nearly 100 % NO3-RR efficiency in 3 h and excellent durability. Meanwhile Cu75Fe25 had high current efficiency (98.01 %) in 30 min and a good stability of nitrate reduction activity after 8 cyclic experiments. The improved electrocatalytic activity on nitrate reduction is attributed to the high electron transfer rate, high adsorption capacity of electroactive species, high electrochemically active surface areas (ECSA) and double layer capacitance (Cdl) of the Cu75Fe25 electrode. Nitrate was first converted to nitrite, followed by acceptance of sixelectron to produce NH3. Density functional theory (DFT) calculations confirmed that the Fe-shifted Cu d-band center contributed to weak adsorption energies of ammonia, and thus resulted in superior activity and selectivity toward NO3 - reduction to NH3. Taking together, results showed the promising application of CuxFey/NF electrodes in electrocatalytic denitrification and ammonia production from wastewater.