▎ 摘　　要

NOVELTY - Method for preparing sulfur and/or nitrogen doped graphene nanosheet, involves chemically depositing and reacting raw materials containing doping source and carbon source in presence of a catalyst under an inactive atmosphere, and removing the catalyst to obtain the sulfur and/or nitrogen doped graphene nanosheets, where the doping source comprises a sulfur source and/or a nitrogen source. USE - The method is used for preparing sulfur and/or nitrogen doped graphene nanosheet, which is used in electrochemical preparation of hydrogen peroxide (all claimed). ADVANTAGE - The sulfur and/or nitrogen doped graphene nanosheet exhibits extraordinary performance of electrocatalytic oxygen reduction to produce hydrogen peroxide in acidic media, and has highest rate and Faraday efficiency in acidic media. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a sulfur and/or nitrogen doped graphene nanosheet, where in the sulfur and/or nitrogen doped graphene nanosheets, the size of a single sheet is 19-21 nm and the size of the stacked body is 300-500 nm; and (2) the use of the sulfur and/or nitrogen doped graphene nanosheet in electrochemical preparation of hydrogen peroxide.