▎ 摘　　要

NOVELTY - A carbon quantum dot/graphene supported bimetallic alloy catalyst comprises a three-dimensional structure carrier comprising graphene, carbon quantum dots loaded on graphene, and a graphene layer supported on a carbon dots layer, and a platinum-non-precious metal bimetallic alloy supported on the three-dimensional structure carrier. The content of platinum in the bimetallic alloy is 10-50 %mass. USE - Carbon quantum dot/graphene supported bimetallic alloy catalyst is used in catalytic oxidation of methanol, electrochemical detection and preparation of electrode (all claimed) e.g. anode of direct alcohol fuel cell. ADVANTAGE - The carbon quantum dot/graphene supported bimetallic alloy catalyst can be prepared by simple, efficient and environmentally-friendly method under mild reaction conditions. DETAILED DESCRIPTION - A carbon quantum dot/graphene supported bimetallic alloy catalyst comprises a three-dimensional structure carrier comprising graphene, carbon quantum dots loaded on graphene, and a graphene layer supported on a carbon dots layer, and a platinum-non-precious metal (PtM) bimetallic alloy supported on the three-dimensional structure carrier. The content of platinum in the bimetallic alloy is 10-50 %mass. M=non-precious metal. INDEPENDENT CLAIMS are included for the following: (1) carbon quantum dot/graphene-supported bimetallic alloy electrode, which comprises base electrode, a graphene layer (I) supported on the base electrode, a carbon quantum dot layer supported on the graphene layer (I), a graphene layer (II) supported on the carbon dots layer, and the bimetallic alloy supported on the three-dimensional structure comprising a graphene layer (I) and graphene layer (II); (2) graphene/carbon quantum dot/graphene layer three-dimensional structure carrier; (3) preparation of carbon quantum dot/graphene supported bimetallic alloy catalyst, which involves performing electrochemical deposition of the carbon quantum dot layer on graphene surface, obtaining carbon quantum dots/graphene, electrochemically depositing the graphene layer on the carbon quantum dots/graphene, obtaining a graphene/carbon quantum dots/graphene three-dimensional structure carrier, and depositing the bimetallic alloy on graphene/carbon quantum dots/graphene three-dimensional structure carrier; and (4) preparation of carbon quantum dot/graphene-supported bimetallic alloy electrode.