▎ 摘　　要

Oxygen species functionalized graphene (O-G) is an effective electrocatalyst for electrochemically synthesizing hydrogen peroxide (H2O2) by a 2 e(-) oxygen reduction reaction (ORR). The type of oxygen species and degree of carbon crystallinity in O-G are two key factors for the high catalytic performance of the 2 e(-) ORR. However, the general preparing method of O-G by the precursor of graphite has the disadvantages of consuming massive strong oxidant and washing water. Herein, the biomass-based graphene with tunable oxygen species is rapidly fabricated by a CO2 laser. In a flow cell setup, the laser-induced graphene (LIG) with abundant active oxygen species and graphene structure shows high catalytic performance including high Faraday efficiency (over 78 %) and high mass activity (814 mmolg(catalyst)(-1) h(-1)), superior to most of the reported carbon-based electrocatalysts. Density function theory demonstrates the meta-C atoms at nearby C-O, O-C=O species are the key catalytic sites. Therefore, we develop one facile method to rapidly convert biomass to graphene electrocatalyst used for H2O2 synthesis.