文献类型：期刊文献

英文题名：Electrochemical reduction of nitrate in a catalytic carbon membrane nano-reactor

作者：Ma, Jing[1];Wei, Wei[2];Qin, Guotong[1];Xiao, Tianliang[3];Tang, Weiqiang[4,5];Zhao, Shuangliang[4,5,6];Jiang, Lei[7];Liu, Shaomin[8]

第一作者：Ma, Jing

通讯作者：Qin, GT[1]

机构：[1]Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China;[2]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu Fatouxili, Beijing 100023, Peoples R China;[3]Beihang Univ, Sch Energy & Power Engn, Shahe Campus, Beijing 102206, Peoples R China;[4]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[6]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China;[7]Beihang Univ, Sch Chem, Key Lab Bioinspired Smart Interfacial Sci & Techn, Minist Educ, 37 Xueyuan Rd, Beijing 100191, Peoples R China;[8]Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China

第一机构：Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China

通讯机构：[1]corresponding author), Beihang Univ, Sch Space & Environm, Shahe Campus, Beijing 102206, Peoples R China.

年份：2022

卷号：208

外文期刊名：WATER RESEARCH

收录：;EI(收录号：20214711194270);Scopus(收录号：2-s2.0-85119254209);WOS:【SCI-EXPANDED(收录号:WOS:000725050500004)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 52070009, 52000006, 51772031) , the China Postdoctoral Science Foundation (Grant No. 2020TQ0026) and Fundamental Research Fund for the Central Universities (buctrc202115) .

语种：英文

外文关键词：Electrochemical reduction; Nitrate; Carbon membrane; Nano-reactor; Bimetal catalysts

摘要：Nitrate pollution is a critical environmental issue in need of urgent addressing. Electrochemical reduction is an attractive strategy for treating nitrate due to the environmental friendliness. However, it is still a challenge to achieve the simultaneous high activity and selectivity. Here we report the design of a porous tubular carbon membrane as the electrode deposited with catalysts, which provides a large triple-phase boundary area for nitrate removal reactions. The achieved nitrate removal rate is one order of magnitude higher than other literatures with high nitrate conversion and high selectivity of nitrogen. The carbon membrane itself had a limited catalytic property thus Cu-Pd bimetal catalysts were deposited inside the nano-pores to enhance the activity and selectivity. When Na2SO4 electrolyte was applied, the achieved single-pass removal of nitrate was increased from 55.15% (for blank membrane) to 97.12% by adding catalysts inside the membrane. In case of NaOH as the electrolyte, the single-pass nitrate removal efficiency, selectivity to nitrogen formation and nitrate removal rate was 90.66%, 96.40% and 1.47 x 10-3 mmol min-1 cm-2, respectively. Density functional theory studies demonstrate that the loading of bimetal catalysts compared with single metal catalysts enhances the adsorption of *NO3 on membrane surface favorable for N2 formation than NH3 on Cu-Pd surface. The application of catalytic carbon membrane nano-reactors can open new windows for nitrate removal due to the high reactor efficiency.