DIKUL - logo
E-viri
Celotno besedilo
Recenzirano
  • WS.sub.2@Co.sub.9S.sub.8@N/...
    Liu, Xiaohui; Li, Xiaofeng; Zhao, Xiaoqi; Gao, Yanfang; Cao, Zhenzhu; Liu, Jinrong

    Journal of materials science, 03/2022, Letnik: 57, Številka: 11
    Journal Article

    It is promising strategy in recent years to design and prepare metal/carbon-based functional materials with different structures using metal-organic framework (MOF) composite precursors. Hollow multi-shell nanomaterials with large specific surface area and abundant active sites have become high energy conversion catalytic materials. The first prepared the transition metal chalcogenides of the nano-structure of the hollow core-shell and then grew the zeolitic imidazolate frameworks-67 in situ on the nanoparticles of core-shell. Then, through pyrolysis to obtain multilayer core-shell particles with porous outer shell of Co/N-doped carbon skeleton. WS.sub.2@Co.sub.9S.sub.8-2@N/C is applied in dye-sensitized solar cells as counter electrode material, showing good catalytic performance for I.sup.-/I.sub.3.sup.- redox reaction, and the power conversion efficiency is as high as 9.85%. As the electrode material of oxygen reduction reaction, the half-wave potential can reach E.sub.1/2 = 0.855 V. For oxygen evolution reaction tests, there is a low overvoltage of 1.757 V when the current density is 10 mV cm.sup.-1. In addition, the MOF can be grown in situ in different nanostructures, which can gain its advantages as a multifunctional material in terms of structure and multi-element, and this method can be applied to the fabricate of composite materials with different structures.