Molten metal-organic complex to synthesize versatile ultrathin nonlayered oxides  

作　　者：Kaisi Liu Jiabin Wu Qun Li Hongrun Jin Yongxin Luo Bei Qi Simin Dai Jianquan Zhao Liang Huang Jun Zhou 

机构地区：[1]Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing,Wuhan Textile University,Wuhan 430200,China [2]Wuhan National Laboratory for Optoelectronics,School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [3]Analytical and Testing Center,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Nano Research》2024年第4期3147-3155,共9页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFA1203500);the National Natural Science Foundation of China(Nos.51972124 and 51902115);the Opening Project of Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing(No.223009025).

摘　　要：Two-dimensional(2D)materials have attracted a great deal of research interest because of their unique electrical,magnetic,optical,mechanical,and catalytic properties for various applications.To date,however,it is still difficult to fabricate most functional oxides as 2D materials unless they have a layered structure.Herein,we report a one-step universal strategy for preparing versatile non-layered oxide nanosheets by directly annealing the mixture of metal nitrate and dimethyl imidazole(2-MI).The 2-MI plays the key role for 2D oxides since 2-MI owns a very low molten point and sublimation temperature,in which its molten liquid can coordinate with metal ions,forming a metal-organic framework,and easily puffing by its gas molecules.A total of 17 materials were prepared by this strategy,including non-layered metal oxide nanosheets as well as metal/metal oxide loaded nitrogen-doped carbon nanosheets.The as-prepared cobalt particle-loaded nitrogen-doped carbon nanosheets(Co@N/C)exhibit remarkable bifunctional oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)electrocatalytic activity and durability.Besides,the Zn-air battery utilizing a Co@N/C catalyst exhibits high power density of 174.3 mW·cm^(-2).This facile strategy opens up a new way for large-scale synthesis of 2D oxides that holds great potential to push 2D oxides for practical applications.

关 键 词：non-layered oxide nanosheet metal/metal oxide@N/C oxygen evolution reaction(OER) oxygen reduction reaction(ORR) Zn-air battery 

分 类 号：O62[理学—有机化学]