▎ 摘　　要

NOVELTY - Palladium nanodendrite-graphene nanocomposite-based hydrogen sensor obtained by mixing palladium nanodendrite which is synthesized by the reduction ratio of the palladium precursor salt in graphene and cetrimonium bromide environment by using palladium nanodendrite as catalyst for detecting hydrogen, is claimed. USE - Used as palladium nanodendrite-graphene nanocomposite-based hydrogen sensor. ADVANTAGE - The sensor has good repeatability even at room temperature and high reaction value of 25%, detects hydrogen of various concentrations with good linearity over a wide range, and exhibits quick response/recovery time. DETAILED DESCRIPTION - Palladium nanodendrite-graphene nanocomposite-based hydrogen sensor obtained by either: mixing palladium nanodendrite which is synthesized by the reduction ratio of the palladium precursor salt in graphene and cetrimonium bromide environment by using palladium nanodendrite as catalyst for detecting hydrogen; or (a) adding ascorbic acid solution and potassium tetrachloropalladate(II) into deionized water, stirring, and preparing mixture solution by aiding cetyltrimethylammonium bromide while stirring, (b) centrifuging the obtained mixture solution, spreading multiple times from the deionized water to remove the reaction product, and synthesizing palladium nanodendrite solution by re-spreading palladium suspension solution from the deionized water, (c) adding palladium nanodendrite solution into graphene oxide aqueous solution containing pure graphite powder, stirring, and forming mixture of palladium nanodendrite-graphene hybrid by adding reducing agent while stirring at a temperature higher than room temperature, (d) coating by spraying the mixture suspension solution of palladium nanodendrite-graphene hybrid on silicon dioxide/silicon base, and (e) forming an ohmic contacting layer by plating precious metals on the surface of the palladium dendrite-graphene/silicon dioxide/silicon base, is claimed.