文献类型：期刊文献

英文题名：Porous solid electrolyte synergistic with alkali metal cations to enhance nitrate electroreduction to ammonia

作者：Qiu, Yannan[1,2];Zhang, Xinwan[1,2];Song, Pengfei[3];Xu, Wenxuan[1,2];Yang, Zhengwu[1,2];Zhang, Lehua[1,2,4];Liao, Benren[5];Jia, Daqing[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[3]Virginia Peninsula Community Coll, Div Sci Technol Engn & Math, Hampton, VA 23666 USA;[4]Shihezi Univ, Sch Chem & Chem Engn, Shihezi 832003, Xinjiang, Peoples R China;[5]Shanghai 4 Reagent Chem Co Ltd, Shanghai 201512, Peoples R China

年份：2025

卷号：999

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20255119722135);WOS:【SCI-EXPANDED(收录号:WOS:001615043600001)】；

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

语种：英文

外文关键词：Porous solid electrolyte; Alkali metal ion; Synergistic effects; Nitrate reduction; Ammonia production

摘要：Nitrate pollution in water contributes to harmful eutrophication and ecological degradation. Electrochemical nitrate reduction to ammonia (NRA) provides a promising method for both removing nitrate pollutants and recovering ammonia. However, the hydrogen evolution reaction (HER) at the cathode hinders nitrate reduction efficiency. The use of porous solid electrolytes (PSE) combined with metal cations can suppress HER through the cation shielding effect, but the impact of different alkali metal cations, anions, and PSE on this effect remains underexplored. This study investigated the synergistic effects of alkali metal cations and PSE on the cation shielding effect for NRA. The results demonstrated that the inclusion of PSE significantly enhanced NRA efficiency compared to conventional membrane electrode assembly. Nitrate reduction efficiency with various alkali metal cations followed the order: Cs+ > K+ > Na+ > Li+, with Cs+ showing the strongest cation shielding effect, as confirmed by the increased double layer capacitance value and enhanced current density. The influence of interlayer alkali metal cation concentrations and anion types on NRA in the PSE system was evaluated as well. Moreover, comparing to different PSE type of D001, IRC, and S-DVB, FPC achieved the highest nitrate reduction (63.31 %) and NH4+-N generation (41.41 mg L-1) through providing the optimal cation channels. Additionally, the presence of OH- and K+ in the cathode chamber optimized cathode-interlayer synergy for NRA. When applied to nitrate-containing silver production wastewater, the PSE system achieved 96.03 % nitrate reduction and 396.38 mg L-1 NH4+-N production in 420 min. These findings highlight the practical potential of PSE systems for efficient nitrate removal and sustainable ammonia synthesis, offering a promising framework for wastewater treatment.