Carbon dots modified nanoflower petals with super enhanced nitrogen electro-reduction efficiency  

作　　者：Yang Zhou Xuanzhao Lu Yu-chung Chang Yanwen Ma Linlin Wang Jianrong Zhang Junjie Zhu 

机构地区：[1]State Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials IAM,Nanjing University of Posts&Telecommunications,Nanjing 210023,China [2]State Key Laboratory of Analytical Chemistry for Life Science,School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,China [3]School of Mechanical and Materials Engineering,Washington State University,Pullman,WA 99164,United States

出　　处：《Chinese Chemical Letters》2023年第6期406-411,共6页中国化学快报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Nos.22004060,22074062,22276100);the Natural Science Foundation of Jiangsu Province(No.SBK2022044384);the financial support from Research startup fund of Nanjing University of Posts and Telecommunications(NJUPT)。

摘　　要：Nitrogen electro-reduction reaction(NERR)is a promising alternative method for ammonia production to the Haber-Bosch approach due to mild reaction conditions and free harmful by-product emission.A formidable challenge in bringing NERR closer to the practical application is developing an electrocatalyst which can simultaneously improve the Faraday efficiency and reduce the reaction over-potential.Herein,we fabricated a catalyst of nitrogen-doped carbon dots modified copper-phosphate nanoflower petals(Cu Po-NCDs NF)via a self-assembly method.The flower structure endowed the Cu Po-NCDs NF with large specific surface area,and thus enabled more active sites to be exposed.In particular,we demonstrated that the NCDs modified Cu Po petals with flower-like structure can accelerate the interfacial proton-electron transfer,suppressing the competing hydrogen evolution reaction and promoting the desired NERR process.Ultimately,for the CuPo-NCDs NF catalyzed NERR,the FE_(NH_(3))and the reaction potential both were boosted,the resultant energy efficiency of NERR reached a record-breaking value of 56.5%,and the NH_(3)yield rate increased by 7 times compared to NCDs.This study provides a novel catalyst with a new pathway to boost the NERR.

关 键 词：Nitrogen-doped carbon dots Nano-flower Self-assembly Interfacial proton-electron transfer Nitrogen electro-reduction 

分 类 号：TQ113.26[化学工程—无机化工] TQ426