Collaborative integration of Fe-N_(x)active center into defective sulfur/selenium-doped carbon for efficient oxygen electrocatalysts in liquid and flexible Zn-air batteries  

作　　者：Yufeng Wu Mingjun Jing Juan Li Wenhui Deng Mingguang Yi Zhanpeng Chen Meixia Yang Jinyang Wu Xinkai Xu Yanson Bai Xiaoqing Zou Tianjing Wu Xianyou Wang 

机构地区：[1]National Base for International Science&Technology Cooperation,National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery,Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education,Xiangtan University,Xiangtan 411105,China

出　　处：《Chinese Chemical Letters》2024年第9期421-425,共5页中国化学快报（英文版）

基　　金：supported by Distinguished Young Scholar Fund Project of Hunan Province Natural Science Foundation(No.2023JJ10041);the Hunan Provincial Education Office Foundation of China(No.21B0147);the Science and Technology Program of Xiangtan(No.GX-ZD20211004);the Hunan Provincial united foundation(No.2022JJ50136);the National Natural Science Foundation of China(No.52003230);the Science and Technology Innovation Program of Hunan Province(No.2021RC2091)。

摘　　要：Strategic active site organization is imperative for the advancement of effective and long-lasting catalysts of oxygen reduction reactions.However,the controllable multi-active site design is a highly intricate topic for catalyst synthesis.Employing pre-trapping and post-activation strategy,Fe-N bonding structure and S,Se functionalized heteroatom are integrated into a conductive porous carbon.In this process,the nitrogen-abundant polymer 1,3,5-triformylbenzene-tris(4-aminophenyl)benzene(Tf-TAPA)adsorbs Fe^(3+)under the intrinsically metal anchoring ability of N atoms and simultaneously in-situ assembles longchain thiophene-S.Subsequently,the Fe^(3+)is transformed into Fe-N_(x)moieties with the conversion of the organic chain to incompletely graphitized carbon.Furthermore,the alteration of the electronic configuration achieved through the introduction of dual-atom S and Se leads to a pronounced enhancement in catalytic efficiency.Benefitting from the Fe-N_(x)bonding structure,dense structural defects,and conductive carbon networks,the resultant Fe-S,Se/NCNs possesses a positive half-wave potential of 0.86 V and a 90%current retention rate,outstripping the Pt/C benchmark.Moreover,the liquid and flexible ZAB driven by Fe-S,Se/NCNs achieves large power densities of 259.7 and 164.7 m W/cm^(2),respectively.This study provides a new comprehension in developing an efficient and stable M-N-C oxygen electrocatalyst.

关 键 词：Atomic regulation Chalcogens co-doped Catalytic performance Noble metal-free electrocatalyst Zn-air battery 

分 类 号：TM911.41[电气工程—电力电子与电力传动] O643.36[理学—物理化学]