Ligand engineering of Co-MOF-74 with hexaaminotriphenylene for enhanced oxygen reduction reaction in zinc-air batteries  

作　　者：Wei Liu Yu Liang Mengtian Huo Nan Ma Kaichi Qin Jinfa Chang Zihao Xing 

机构地区：[1]Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education,Faculty of Chemistry,Northeast Normal University,Changchun 130024,China

出　　处：《Nano Research》2025年第2期290-297,共8页纳米研究(英文版)

基　　金：This work was supported by National Natural Science Foundation of China(Nos.22202037,22472023 and 22102105);the Fundamental Research Funds for the Central Universities(Nos.2412024QD014 and 2412023QD019).

摘　　要：Zinc-air batteries hold great promise as a next-generation efficient and environmentally friendly energy technology.However,the sluggish kinetics of the oxygen reduction reaction(ORR)process pose a significant challenge to their development.To address this issue,atom dispersion catalysts are developed to maximize the utilization of metal active centers.Metal-organic frameworks(MOFs)are a series of molecular materials with high atomic-level dispersion metal utilization,but they often lack sufficient electrical conductivity.Their application in MOF electrocatalysis remains limited unless the MOF material is transferred to a carbon-based material through heat treatment.To overcome this limitation,we employed coordination engineering to incorporate hexaaminotriphenylene(HATP)molecules with strong conjugation into Co-MOF-74.The resulting Co-MOF-74-HATP catalyst represents high activity,achieving an ORR half-wave potential(E_(1/2))of 0.84 V and demonstrating good stability(ΔE_(1/2)=20 mV after 10,000 cycles).Additionally,the Co-MOF-74-HATP also performs a 320 mV overpotential(10 mA·cm^(-2))for the oxygen evolution reaction.Meanwhile,Co-MOF-74-HATP displays a peak power density of 96.6 mW·cm^(-2) in zinc-air batteries,surpassing the commercially available Pt/C+RuO_(2).This work presents a new pathway to design MOF-based ORR catalysts and provides a new direction for the preparation of key materials for zinc-air battery(ZAB).

关 键 词：molecular catalysts oxygen reduction reaction zinc-air battery coordination environment metal-organic framework 

分 类 号：O64[理学—物理化学]