Defined organic-octamolybdate crystalline superstructures derived Mo_(2)C@C as efficient hydrogen evolution electrocatalysts  

作　　者：Jiao Li Chenyang Zhang Chuhan Wu Yan Liu Xuejian Zhang Xiao Li Yongtao Li Jing Sun Zhongmin Su 

机构地区：[1]School of Materials Science and Engineering,Jilin Jianzhu University,Changchun 130018,China [2]School of Chemical and Environmental Engineering,Changchun University of Science and Technology,Changchun 130022,China

出　　处：《Chinese Chemical Letters》2024年第6期201-205,共5页中国化学快报（英文版）

基　　金：financially supported by Joint Fund Project of the Natural Science Foundation of Jilin Province(No.YDZJ202301ZYTS290)。

摘　　要：Hydrogen evolution electrocatalysts derived from metal-organic crystalline frameworks can inherit the merits of ordered and adjustable structures with high surface area.In this paper,organic-octamolybdate crystalline superstructures(OOCS)with a fixed stoichiometric ratio of Mo_(8)(L)_(2) and high Mo content(>40 wt%)were synthesized using flexible ligands with controllable lengths(named as OOCS-1-3).Then,molybdenum carbides coated with carbon layers as electrocatalysts(Mo_(2)C@C-1-3)can be obtained directly from a one-step high-temperature carbonization process using OOCS-1-3 as precursors.As a typical example,Mo_(2)C@C-3 exhibits satisfactory hydrogen evolution activity with a low overpotential of 151 m V(1.0 mol/L KOH)at 10 m A/cm^(2) and stability for 24 h.The electrocatalytic activity is mainly from the synergistic interactions between the carbon layers and molybdenum carbide species.Furthermore,compared with the initial content of C,N,Mo in OOCS and Mo_(2)C@C,the catalytic activity increases with the N amount.This work makes organic-octamolybdate crystalline superstructures used as general precursors to product high Mo content electrocatalysts applied in energy storage and conversion fields.

关 键 词：Molybdenum carbides ELECTROCATALYSTS Organic-octamolybdate crystalline SUPERSTRUCTURES Synergistic interactions Hydrogen evolution reaction(HER) 

分 类 号：TQ116.2[化学工程—无机化工] TQ426