文献类型：期刊文献

英文题名：In situ growth of copper/reduced graphene oxide on graphite surfaces for the electrocatalytic reduction of nitrate

作者：Yin, Di[1];Liu, Yiyang[1];Song, Pengfei[2];Chen, Peng[1];Liu, Xie[1];Cai, Lankun[1];Zhang, Lehua[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Meilong Rd, Shanghai 200237, Peoples R China;[2]Thomas Nelson Community Coll, Div Sci Engn & Technol, Hampton, VA 23666 USA;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2019

卷号：324

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20193807447324);WOS:【SCI-EXPANDED(收录号:WOS:000489840900036)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (21876050), the National key research and development plans (2018YFC1800600) and the special fund from State Key Joint Laboratory of Environment Simulation and Pollution Control (18K10ESPCT).

语种：英文

外文关键词：Reduced graphene oxide; Copper nanoparticle; Electrochemical exfoliation; Electrocatalytic denitrification

摘要：A fast and simple electrochemical method was developed to make composite electrodes containing monodispersed copper nanoparticles (Cu NPs) and reduced graphene oxide (rGO) for nitrate removal. The Cu/rGO/graphite plate (GP) electrodes were fabricated after in situ electrochemical exfoliation and a one-step simultaneous graphene oxide (GO) reduction and Cu deposition. Bulk electrolysis results showed the percentage of nitrate removal up to 96.8% after 3 h and the reaction rate constant of the Cu/rGO/GP electrode was 14.08, 8.00 and 1.94 times higher than those of GP, GO/GP and Cu/GP electrodes, respectively. Further analysis revealed improvements in electron transfer, adsorption of the electroactive species and electrochemically active surface area, which all contributed to the enhancement of electrocatalytic nitrate reduction. Furthermore, the mechanism of nitrate reduction with the Cu/rGO/GP electrode was studied in detail by cyclic voltammetry. The voltammogram profile of the Cu/rGO/GP electrode after 50 scanning cycles was similar to that of the initial cycle, and the percentage of nitrate removal was still at 92.4% after the eighth application, demonstrating the high stability of the composite electrode. Taking together, results showed the promising application of graphene-based electrodes with copper nanoparticles in electrocatalytic denitrification. (C) 2019 Elsevier Ltd. All rights reserved.