▎ 摘　　要

NOVELTY - Reduced graphene oxide-gold-palladium-platinum composite nanomaterial comprises reduced graphene oxide and gold-palladium-platinum core-alloy shell nanoparticles loaded on reduced graphene oxide, where diameter of gold-palladium-platinum core-alloy shell nanoparticles is less than 50 nm. USE - The nano-material is useful for ammonia nitrogen detection electrode (claimed). ADVANTAGE - The nanomaterial: has excellent ammonia nitrogen sensitive characteristic, excellent physical and chemical properties, large specific surface area, and large number of potential active sites. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation of reduced graphene oxide-gold-palladium-platinum composite nanomaterial. The method utilizes cetyltrimethylammonium chloride, sodium borohydride and sodium tetrachloropalladate(II); and (2) ammonia nitrogen detection electrode. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the reduced graphene oxide-gold-palladium-platinum composite nanomaterial.