碱金属阳离子对硝酸根还原产氨反应的元素依赖性影响

作     者：张意达 马镇涛 杨绍康 王青雨 刘利民 柏彧 饶德伟 王功名 李洪良 郑旭升 Yida Zhang;Zhentao Ma;Shaokang Yang;Qingyu Wang;Limin Liu;Yu Bai;Dewei Rao;Gongming Wang;Hongliang Li;Xusheng Zheng

作者机构：National Synchrotron Radiation LaboratoryUniversity of Science and Technology of ChinaHefei 230029China Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China College of Chemistry and Materials ScienceExperimental Center of Engineering and Material ScienceUniversity of Science and Technology of ChinaHefei 230026China School of Materials Science and EngineeringJiangsu UniversityZhenjiang 212013China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2024年第69卷第8期

页      面：1100-1108页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：financial support by the National Natural Science Foundation of China(12222508,U1932213,and 22308346) the Fundamental Research Funds for the Central Universities(WK2060000016) the USTC Research Funds of the Double First-Class Initiative(YD2310002005 and YD9990002014) the National Key R&D Program of China(2023YFA1506304) the Youth Innovation Promotion Association CAS(2020454) Xiaomi Young Talents Program Joint Funds from the Hefei National Synchrotron Radiation Laboratory(KY9990000202) Natural Science Foundation of Anhui Province(2208085QB42) 

主　　题：Nitrate reduction Alkali cations Potassium Ni single-atom catalyst Ammonia 

摘      要：Catalytic conversion of nitrate(NO_(3)^(-))pollutants into ammonia(NH_(3))offers a sustainable and promising route for both wastewater treatment and NH_(3)*** cations are prevalent in nitrate solutions,but their roles beyond charge balance in catalytic NO_(3)^(-)conversion have been generally ***,we report the promotion effect of K^(+)cations in KNO_(3)solution for NO_(3)^(-)reduction over a TiO_(2)-supported Ni single-atom catalyst(Ni_(1)/TiO_(2)).For photocatalytic NO_(3)^(-)reduction reaction,Ni_(1)/TiO_(2)exhibited a 1.9-fold NH_(3)yield rate with nearly 100%selectivity in KNO_(3)solution relative to that in NaNO_(3)*** studies reveal that the K^(+)cations from KNO_(3)gradually bonded with the surface of Ni_(1)/TiO_(2),in situ forming a K-O-Ni moiety during reaction,whereas the Na^(+)ions were unable to interact with the catalyst in NaNO_(3)*** charge accumulation on the Ni sites induced by the incorporation of K atom promoted the adsorption and activation of NO_(3)^(-).Furthermore,the K-O-Ni moiety facilitated the multiple proton-electron coupling of NO_(3)^(-)into NH_(3)by stabilizing the intermediates.