Preparation and electrocatalytic performance of the Cu-doped MoS2 catalytic layer on molybdenum sheet
A one-step hydrothermal method was used for the in situ synthesis of transition metal Cu-doped MoS2 catalyt-ic layer on the surface of molybdenum flakes to compare the effects of different ratios of Cu doping on the catalytic layer structure and electrocatalytic hydrogen precipitation performance.This work discusses the mechanism of Cu doping for enhancing electrocatalytic performance.The results show that the transition metal Cu doping has a certain effect on the microscopic morphology of the material,and the surface morphology is gradually refined and homogeneous with the in-crease of Cu doping ratio to form a nanostructure.The introduction of Cu has a great improvement on the electrocatalytic performance of the material in 0.5 mol/L H2SO4 solution,only 183 mV overpotential is required to reach a current density of 10 mA·cm-2.The good electrocatalytic performance is attributed to the following three points:first,the CuO/MoS2 het-erostructure alters the MoS2 electronic structure and accelerates the electron transfer;second,the use of the conductive substrate and in situ vulcanization process effectively reduces the charge transfer resistance;and third,the nano-sized la-mellar structure plays a significant role in the increase of electrochemically active area.In summary,the in situ synthesis of Cu-doped MoS2 catalytic layer on the surface of molybdenum flakes is simple to prepare and can effectively improve the electrocatalytic performance of the material.
MoS2in situ sulfidationhydrogen evolution reactiontransition metal dopingheterostructure
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