Abstract
The controllable morphology and composition of catalysts are crucial to improving the electrocatalytic activity of oxygen evolution reaction(OER).Herein,we construct a bimetallic heterostructure by sulfi-dation and hydrothermal methods,and the layered ReS2 is vertically aligned on Prussian blue-derived hollow Co9S8 nanocubes(Co9S8@ReS2).The core-shell structure of Co9S8@ReS2 can effectively prevent the restacking of layered ReS2,expose the abundant surface area and improve the utilization of electro-catalytic sites,resulting in fast electrolyte diffusion and charge transfer during OER.Due to the synergistic effect of the core-shell morphology and the formed bimetallic heterostructure,Co9S8@ReS2 exhibits ex-cellent catalytic OER performance.At 10mA/cm2,only 288 mV of overpotential is required with the Tafel slope of 73.3mV/dec for Co9S8@ReS2,which are both lower than that of Co9S8 and ReS2.Meanwhile,Co9S8@ReS2 exhibits high catalytic stability and low charge transfer resistance and the boosted active sites are confirmed by density functional theory.This work provides a rational design of the OER cata-lysts by constructing the bimetallic heterostructure.
基金项目
Natural Science Research of the Jiangsu Higher Education Institutions of China(18KJB150034)
江苏省"六大人才高峰"高层次人才项目(XCL-103)
'High-End Talent Project'of Yangzhou University()
NETL
NSTL
万方数据