文献类型：期刊文献

英文题名：Active hydrogen tuning by copper-cobalt bimetal catalysts for boosting ammonia electrosynthesis from simulated wastewater

作者：Yang, Chunqi[1];Liu, Chang[1];Zhuang, Jingwen[1];Yang, Ziyan[1];Chen, Aiping[1];Li, Yuhang[1];Li, Chunzhong[1,2,3]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, Shanghai 200240, Peoples R China

年份：2024

卷号：27

期号：1

起止页码：209

外文期刊名：GREEN CHEMISTRY

收录：;EI(收录号：20244817453778);WOS:【SCI-EXPANDED(收录号:WOS:001360711300001)】；

基金：This work was supported by the National Natural Science Foundation of China (22322805, 22178104, U22B20143), the Shanghai Municipal Science and Technology Major Project, the Shanghai Scientific and Technological Innovation Project (22dz1205900), the "Fundamental Research Funds for the Central Universities", and the Shanghai Rising-Star Program (23QA1402200).

语种：英文

外文关键词：Bimetals - Cobalt alloys - Cobalt compounds - Copper alloys - Copper compounds - Hydrogen production - Magnesium compounds - Oxygen reduction reaction - Wastewater treatment

摘要：The electrochemical nitrate reduction reaction (NO3RR) represents a promising approach to balance the nitrogen cycle, converting environmental pollutant NO3- to valuable ammonia (NH3). However, the whole reaction involves complex proton-coupled electron transfer processes, requiring the development of efficient catalysts. Owing to unique d-orbitals, Cu-based catalysts exhibit excellent performance. Here, we design a Cu5-Co5 bimetal nanocomposite that achieves a high FENH3 of 94.1%, a yield rate of 14.8 mg h-1 cm-2 and great stability over twenty hours. The yield rate can be enhanced in a flow cell and reach 30.9 mg h-1 cm-2. We test the performance of the Cu5-Co5 catalyst for simulated wastewater treatment, exhibiting a yield rate of 6.7 mg h-1 cm-2 at -100 mA cm-2. Furthermore, in situ ATR-SEIRAS and Raman spectra reveal the reaction pathway on the Cu5-Co5 catalyst. The Cu can adsorb NO3- and convert to *NO2-, while Co(OH)2 derived from metallic Co can promote water spillover and facilitate the subsequent *NO2--to-NH3 conversion.