▎ 摘　　要

NOVELTY - A catalyst comprises oxidation graphene nanosheet which is reduced by dipping sheet in ionic liquid, supported by metal or metal oxide nanoparticles as carrier. USE - Catalyst is used for oxygen reduction electrode for metal air battery, zinc air cell and alkaline fuel cell (all claimed). ADVANTAGE - The catalyst has high catalytic effect and electrochemical characteristics. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of catalyst; (2) metal air battery; (3) zinc air cell; and (4) alkaline fuel cell.