▎ 摘　　要

NOVELTY - Platinum- mesoporous calcium silicate/graphene electrocatalytic hydrogen evolution catalyst, comprises using graphene as a conductive carrier, mesoporous calcium silicate as a restricted and maintaining two-dimensional morphology medium, and platinum nanoparticles as active metals, where the platinum nanoparticles are embedded in the two-dimensional mesoporous structure based on the catalyst, the content of platinum nanoparticles is 1-15 wt.%. USE - The platinum-CS/graphene electrocatalytic hydrogen evolution catalyst is used for hydrogen production by water electrolysis. ADVANTAGE - The catalyst has excellent hydrogen evolution activity when the load amount of the noble metal is low, the over-potential of current density mA/cm 2 is 23 mV, after 1000 times of voltammetry cycle test, and the overpotential can still be kept at 24 mV Pt/graphene and commercial 20 wt.% Pt/C better than the same load quantity. The two-dimensional graphene mesoporous structure calcium silicate can effectively prevent the growth and loss of Pt nano-particles, and greatly improve the dispersibility, and increases the reaction area of the catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of Pt -CS/graphene electro-catalytic hydrogen evolution catalyst. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscope (SEM) diagram of Pt @ CS/graphene electrocatalysis hydrogen evolution catalyst.