Upgrading waste NO_(x) into amino acids via electrocatalysis on Co nanoparticles encapsulated in hollow carbon nanofibers

作     者：Jiahui Xian Kaixing Cai Peisen Liao Shihan Wang Guangqin Li 

作者机构：Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of EducationLIFMIGCMESchool of ChemistrySun Yat-Sen UniversityGuangzhou510275China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2024年第67卷第6期

页      面：1946-1952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] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the Overseas High-level Talents Plan of China,the National Natural Science Foundation of China Projects(22075321,21821003 and 21890380) the Program for Guangdong Introducing Innovative and Entrepreneurial Teams(2017ZT07C069) Guangdong Basic Research Center of Excellence for Functional Molecular Engineering。 

主　　题：electrocatalysis NO_(x)reduction amino acid porous materials hollow structure 

摘      要：Electrocatalytic conversion of waste nitrogen oxide(NO_(x))into value-added nitrogenous chemicals,especially amino acid,is an emerging strategy to alleviate NO_(x)pollution.However,this process suffers from the coexistence of multiple competitive reactions leading to complex product distribution and low efficiency,and thus the rational design and modulation of efficient catalysts remains a formidable challenge.Herein,well-designed Co nanoparticles encapsulated in hollow carbon nanofiber(CoHCNF)were constructed to promote the amino acid electrosynthesis via dealing waste NO_(x)coupling with biomass-derived keto acids.Ascribed to the rapid reactant diffusion,electron transport and efficient contact with abundant accessible Co catalytic sites stemmed from the unique hollow nanotubular structure,Co-HCNF manifested impressive glycine synthesis performance in one-pot adopting NO as the nitrogen source with Faradaic efficiency(FE)of 41.7%and a corresponding yield rate of 222.3μmol h^(-1)as well as 120 h robust stability.Interestingly,it also demonstrates an excellent performance with the FE of 42.8%for NO_(3)~-solution as the nitrogen source.Specially,this strategy displays a broad universality for the synthesis of other amino acids.This work not only highlights the importance of hollow-structuring electrocatalyst towards upgrading wasted NO_(x)species into amino acids,but also promotes the further development of electrosynthetic systems for high-valued N-containing organic chemicals.