Progress of heteroatom-doped carbon materials for the electro-synthesis of hydrogen peroxide
Hydrogen peroxide(H2O2)is widely used in the treatment of municipal drinking water,industrial wastewater and municipal wastewater.However,the application of H2O2 in decentralized water treatment is limited by the risks(e.g.,corrosion and explosion)associated with the transport and storage of H2O2 stocks.On-site production of H2O2 from 2-electron oxygen reduction(2e ORR)is a promising way to supply H2O2 for decentralized water treatment.However,uncatalyzed 2e-ORR has slow kinetics and poor selectivity,and thus cannot meet the requirements of large-scale production.In contrast,heteroatom-doped carbon materials have good 2e OPR activity,selectivity and stability.This paper reviews the mechanism of 2e ORR reaction and the modification principle of the catalyst.Further,the mechanism of heteroatom nitrogen,oxygen and fluorine-doped carbon materials is described,and several doped structures with excellent 2e ORR catalytic activity and selectivity are summarized.Finally,the future development of heteroatom-doped carbon material synthesis H2O2 and its application in water treatment is prospected.
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