Designing an efficient electrocatalyst for hydrogen evolution reaction(HER)is rather essential for the field of electrocatalytic hydrogen production.We here report a three-dimensional(3D)graphene nanowire grown on our...Designing an efficient electrocatalyst for hydrogen evolution reaction(HER)is rather essential for the field of electrocatalytic hydrogen production.We here report a three-dimensional(3D)graphene nanowire grown on our self-made porous nickel tube prepared by a microwave plasma enhanced chemical vapor deposition(MPCVD)method.Then,the MoS_(2) nanosheets are in situ grown on graphene in a vertically stacked manner through a simple hydrothermal synthesis method.It is found that these vertical graphene nanosheets can be used as an effective support to anchor MoS_(2) nanosheets stably and evenly on its surface.As a result,the prepared catalyst exhibits excellent HER electrocatalytic activity,which is attributed to plentiful edge active sites provided by the vertical MoS_(2) nanosheets and the efficient electron transport pathway provided by graphene on a matrix with good conductivity.In addition,the outwardly extending nanowire-like structure of the catalyst increases its surface area,as well as reduces the steric hindrance between active sites and the electrolyte.展开更多
基金sponsored by the National Natural Science Foundation of China(No.22522818 and 22308381)Science Foundation of China University of Petroleum-Beijing(No.2462023QNXZ002).
文摘Designing an efficient electrocatalyst for hydrogen evolution reaction(HER)is rather essential for the field of electrocatalytic hydrogen production.We here report a three-dimensional(3D)graphene nanowire grown on our self-made porous nickel tube prepared by a microwave plasma enhanced chemical vapor deposition(MPCVD)method.Then,the MoS_(2) nanosheets are in situ grown on graphene in a vertically stacked manner through a simple hydrothermal synthesis method.It is found that these vertical graphene nanosheets can be used as an effective support to anchor MoS_(2) nanosheets stably and evenly on its surface.As a result,the prepared catalyst exhibits excellent HER electrocatalytic activity,which is attributed to plentiful edge active sites provided by the vertical MoS_(2) nanosheets and the efficient electron transport pathway provided by graphene on a matrix with good conductivity.In addition,the outwardly extending nanowire-like structure of the catalyst increases its surface area,as well as reduces the steric hindrance between active sites and the electrolyte.
