Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 28, Issue 60, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202201996
Keywords
biomass-based graphene; CO2 laser; electrocatalyst; hydrogen peroxide; oxygen specie
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Funding
- National Natural Science Foundation of China [51902162, BK20221338]
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University
- merit-based funding for Nanjing innovation and technology project
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Oxygen species functionalized graphene is an effective electrocatalyst for synthesizing hydrogen peroxide through a two-electron oxygen reduction reaction. The type of oxygen species and carbon crystallinity are key factors for its high catalytic performance. However, the traditional method of preparing oxygen species functionalized graphene has drawbacks such as consuming a large amount of strong oxidant and requiring washing. In this study, biomass-based graphene with tunable oxygen species is rapidly fabricated using a CO2 laser and shows high catalytic performance in hydrogen peroxide synthesis.
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.
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