文献类型：期刊文献

英文题名：Engineering Co/CoO heterojunctions stitched in mulberry-like open-carbon nanocages via a metal-organic frameworks in-situ sacrificial strategy for performance-enhanced zinc-air batteries

作者：Zhang, Fuping[1];Chen, Long[1];Zhang, Yinglin[1];Peng, Yuanyuan[1];Luo, Xing[1];Xu, Yisheng[1,2];Shi, Yulin[1]

机构：[1]Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：447

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20222712319976);WOS:【SCI-EXPANDED(收录号:WOS:000817892400004)】；

基金：This work was supported by the National Natural Science Foundation of China [grant numbers 52160008, 51962032] , the International One Belt One Road Collaboration Project of Shanghai [grant number 18490740300] , the National Key Research and Development Program of the International Scientific and Technological Innovation Cooperation Project among Governments [grant number 2021YFE0100400] , the Open Sharing Fund for the Large-scale Instruments and Equipments of Shihezi University.

语种：英文

外文关键词：In-situ sacrificial template; Co/CoO heterojunction; Mulberry-like hollow structure; Bifunctional oxygen electrocatalysts; Zn-air battery

摘要：Hollow nanocages are receiving immense research interest in oxygen redox electrocatalysis owing to their well-defined interior space and large surface areas. However, the conventional enclosed hollow nanostructures suffer from their large mass transfer resistance and incompletely exposed internal space. Herein, we develop a facile metal-organic framework (MOF) in-situ self-sacrificial template strategy for fabricating Co/CoO heterojunction stitched in mulberry-like hollow N-doped carbon (Co/CoO@HNC) towards oxygen electrocatalysis. The shell of Co/CoO@HNC is composed of N-doped carbon nanosphere subunits with abundantly dispersive Co/CoO heterojunction and open mass transfer channel. Benefiting from the abundant mass transfer channel of the mulberry-like hollow architecture and unique electronic properties by Co/CoO heterojunction and N-doping, as-fabricated Co/CoO@HNC affords more exposed internal space and accessible active site, thus facilitating the catalyst enhanced bifunctional oxygen electrocatalytic activity with a potential discrepancy (Delta E) of 0.83 V, far excelling the noble-metal-based Pt/C (0.99 V) and RuO2 (1.05 V). The Co/CoO@HNC based zinc-air battery (ZAB) renders a higher energy density of 920.5 Wh kg(Zn)(-1) and superior discharge/charge stability (over 250 h) than those of commercial Pt/C+RuO2 hybrid based ZAB (856.2 Wh kg(Zn)(-1), less than 100 h). The present work may offer a new way for engineering hollow materials for various energy-related applications.