Wood-derived Co@CoO/BNC bifunctional electrocatalyst for high-efficient zinc-air batteriesOA
The utilization of wood-derived porous carbon as catalytic electrodes in metal-air batteries has garnered sig-nificant attention.Although extensive efforts have focused on developing and optimizing active sites,the insufficient electrical conductivity of wood-derived carbon-based electrodes remains a frequently overlooked challenge.In this study,we successfully constructed boron and nitrogen co-doped Co@CoO/BNC composite through multidimensional structural and compositional synergy,demonstrating exceptional catalytic activity.Specifically,ZIF-67 was confined in situ within wood cell structure to derive carbon materials with controllable growth of Co@CoO nanoparticles,preserving the hierarchical porous structure to ensure superior mass and electron transport.Furthermore,boron and nitrogen co-doping generated B-N-C,which modulated the electronic structure of metal centers and induced high-density topological defects in the carbon matrix,synergistically enhancing catalytic activity.The Co@CoO/BNC composite demonstrated outstanding bifunctional catalytic performance for both oxygen reduction reaction(ORR,half-wave potential E1/2=850 mV)and oxygen evolution reaction(OER,overpotential of 310 mV at 10 mA cm^(-2)).Notably,the narrow potential gap of 715 mV between ORR and OER significantly surpassed that of commercial Pt/C+RuO_(2) catalysts.Moreover,the as-prepared Co@CoO/BNC architecture also exhibited remarkable stability.When employed as an air cathode in zinc-air batteries,it delivered a specific capacity of 958.5 mA h g^(-1) and maintained exceptional cycling stability for over 300 h.This work provides critical insights into the rational design of carbon-based bifunctional oxygen electrocatalysts and highlights the high-value utilization of forest biomass-derived materials in renewable electrochemical energy conversion systems.
Jiawei Zhang;Zhiqiang Yang;Ming Li;Shixin Yu;Xingze Yang;Liyuan Gong;Shuo Dou
State Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,ChinaState Key Laboratory of Utilization of Woody Oil Resource,Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education,Northeast Forestry University,Harbin,150040,China
信息技术与安全科学
Wood-derived carbonMOFsCo@CoO nanoparticlesBoron/nitrogen co-dopingOxygen electrocatalysis
《Resources Chemicals and Materials》 2026 (1)
P.78-86,9
the National College Students''Innovation and Entrepreneurship Training Program of Northeast Forestry University(Grant No 202410225031)the Fundamental Research Funds for the Central Universities(Grant No 2572023CT04)Key Project of the 14th Five-Year Plan for Educational Science in Heilongjiang Province(Grant No.GJB1424131).
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