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 

机构地区：[1]Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,LIFM,IGCME,School of Chemistry,Sun Yat-Sen University,Guangzhou,510275,China

出　　处：《Science China Chemistry》2024年第6期1946-1952,共7页中国科学（化学英文版）

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。

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.

关 键 词：ELECTROCATALYSIS NO_(x)reduction amino acid porous materials hollow structure 

分 类 号：X701[环境科学与工程—环境工程] TQ226.36[化学工程—有机化工]