Few-Layered WS2 Anchored on Co, N-Doped Carbon Hollow Polyhedron for Oxygen Evolution and Hydrogen Evolution

• DOI: 10.1021/acsami.2c00326
• Publication Date: 2022-04-25T11:45:01Z
• Authors: Liangbin Xia; Kunming Pan; Haitao Wu; Fang Wang; Yong Liu; Yanjie Xu; Zhili Dong; Bicheng Wei; Shizhong Wei
• Keywords: Oxygen evolution

Tungsten disulfide (WS2) is well known to have great potential as an electrocatalyst, but the practical application hampered by its intrinsic inert plane and semiconductor properties. In this work, owing a Co-based zeolite imidazole framework (ZIF-67) that effectively inhibited WS2 growth, few-layered was confined surface of Co, N-doped carbon polyhedron (WS2@Co9S8), with more marginal active sites higher conductivity, which promoted efficient oxygen evolution reaction (OER) hydrogen (HER). For first time, WS2@Co9S8 prepared mixing in one pot liquid phase calcination, realized uniform distribution on electrostatic adsorption phase. The obtained hybrid catalyst exhibited excellent OER HER catalytic activity, only 15 mV at 10 mA cm-2 than noble metal oxide (RuO2). improvement activity can be attributed enhanced exposure sulfur edge WS2, unique synergistic effect between Co9S8 metal-organic (MOF) surface, effective shortening diffusion path hollow multi-channel structure. Therefore, robust (WS2@Co9S8) simple synthesis method work will serve highly promising bifunctional for HER.