The Electrocatalytic Performance of Rare Earth Ion Doped Co_(0.2)Ni_(0.8)-MOF-74 Catalyst for Nitrogen Reduction  

作　　者：YUE Song GONG Lunjun YANG Tonghui HU Weida LIU Xiaopan GAO Pengzhao XIAO Hanning 刘小磐

机构地区：[1]College of Materials Science and Engineering,Hunan University,Changsha 410082,China [2]College of Materials Science and Engineering,Xiangtan University,Xiangtan 411199,China [3]Liling Ceramic College,Hunan University of Technology,Zhuzhou 412200,China [4]Hunan Yangdong Porcelain Insulators&Electric Co.Ltd.,Zhuzhou 412205,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2024年第6期1337-1347,共11页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Central Government Guides Local Funds for Scientific and Technological Development(No.2023ZYQ004);the Hunan Provincial Natural Science Foundation of China(No.2021JJ50036);the Hunan Provincial Key Research and Development Plan(No.2023GK2083)。

摘　　要：We took Co_(0.2)Ni_(0.8)-MOF-74 with bimetallic synergistic effect as the basic material,and selected rare earth ions Ho,Gd,and Er with ion radii close to Co and Ni as the research objects for doping.The influence of rare earth ion doping amount and doping type on the eNRR performance of the catalyst was explored.The experimental results show that the ammonia yield rate and Faraday efficiency doped with Co_(0.2)Ni_(0.8)-MOF-0.5Ho are the highest,reaching 1.28×10^(-10)mol·s^(-1)·cm^(-2)/39.8%,which is higher than the1.12×10^(-10)mol·s^(-1)·cm^(-2)/32.2%of Co_(0.2)Ni_(0.8)-MOF-74,and is about 14.3%/23.7%higher than that without doping,respectively.And the stability of Co_(0.2)Ni_(0.8)-MOF-0.5 Ho is good(after 80 hours of continuous testing,the current density did not significantly decrease).This is mainly due to doping,which gives Co_(0.2)Ni_(0.8)-MOF-74 a larger specific surface area and catalytic active sites.The catalyst doped at the same time has more metal cation centers,which increases the electron density of the metal centers and enhances the corresponding eNRR performance.

关 键 词：electrocatalytic nitrogen reduction metal organic framework rare earth ions DOPING 

分 类 号：TQ116.2[化学工程—无机化工] TQ426