▎ 摘　　要

NOVELTY - The material has a ventilating film i.e. PTFE film, comprising noble metal nano-particle. A graphene composite material layer is formed on a surface of the ventilating film having the noble metal nano-particle for forming a sense electrode, where thickness of the composite material layer is 1-500 micron. The noble metal nano-particle comprises molybdenum metal nano-particle, gold nano-particle metal, iridium metal nano-particle or palladium metal nano-particle. USE - Noble metal and graphene composite material for making a sense electrode of an electrochemical gas sensor that is utilized for detecting hydrogen, carbon monoxide and ethyl alcohol gas (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a noble metal and graphene composite material preparation method for a sense electrode of an electrochemical gas sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating a noble metal and graphene composite material preparation method.