Perovskite LiBaH_(3) for photo-assisted dinitrogen fixation  

作　　者：Kaixun Cui Yeqin Guan Yongli Cai Runze Wang Qianru Wang Wenbo Gao Jianping Guo Ping Chen 

机构地区：[1]Department of Chemical Physics,University of Science and Technology of China,Hefei 230026,China [2]Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Center of Materials and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China Chemistry》2025年第3期1169-1174,共6页中国科学(化学英文版)

基　　金：supported by the National Key R&D Program of China (2021YFB4000400);the National Natural Science Foundation of China (21988101,22402200);the Youth Innovation Promotion Association CAS (Y2022060);the Liaoning Distinguished Scholars (2024JH3/50100007)。

摘　　要：Establishing supply chains for future ammonia energy systems requires the development of efficient materials and processes for ammonia production under mild conditions.Recent researches disclose unique functionalities of binary alkali and alkaline earth metal hydrides in mediating ammonia synthesis.Thanks to the rich compositional and structural properties of the metalhydrogen system,we herein report that LiBaH_(3),as a narrow band gap perovskite hydride,exhibits a strong response to visible light illumination.Specifically,hydridic hydrogen undergoes reductive elimination of producing H_(2)and creates an electron-rich surface.Such an environment favors dinitrogen fixation to form N-H bonds.Based on this chemical property,a chemical looping ammonia synthesis process mediated by LiBaH_(3)and driven by both photo and thermal energies was proposed and evaluated.This work demonstrates that hydride perovskites are promising candidates for mediating photo-assisted nitrogen fixation reactions.

关 键 词：perovskite hydride photo-assisted ammonia synthesis chemical looping 

分 类 号：TQ113[化学工程—无机化工] TB34[一般工业技术—材料科学与工程]