摘要
2D transition metal disulfides have emerged as promising Pt-alternative electrocatalysts for hydrogen generation.However,the sluggish water dissociation kinetics and limited active sites hinder their performance in alkaline media.Herein,we propose a two-step hydrothermal method to synthesize K intercalation-assisted Codoped MoS_(2) nanoflowers.These nanoflowers exhibit an overpotential of only 67 mV at a current density of 10 mA cm^(-2),which exceeds that of pristine MoS_(2)(143 mV).We demonstrated that the intercalation of K enlarges the interlayer spacing of MoS_(2) nanosheets and facilitates the doping of Co.The incorporation of Co effectively improves the surface charge transfer efficiency of MoS_(2) and accelerates water splitting with an energy barrier of 0.12 eV.This work offers an approach to activate the inert MoS_(2) basal plane by chemical intercalation and atomic doping coengineering.It can be extended to develop other functional materials beyond water splitting.
基金
the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(2022C01151)
the National Natural Science Foundation of China(21802120 and 21872121).
