N-doped carbon-based catalysts in situ generation hydrogen peroxide via 2-electron oxygen reduction reaction for degradation of organic contaminants in heterogeneous electro-Fenton process: A mini review

Guo, Yanjun; Tang, Chenliu; Cao, Chuan; Hu, Xiang

doi:10.1016/j.surfin.2023.102879

Cited by 4 publications

(2 citation statements)

References 125 publications

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“…For one typical example, O-doped or O,N-codoped carbon nanomaterials showed good 2e − ORR performance with H 2 O 2 selectivity of over 90%. 18,19 In addition, it has been shown that B atoms can be readily doped into a carbon skeleton, thereby selectively promoting the ORR. 20,21 According to density functional theory (DFT) simulations, the B atom as the active site has almost zero overpotential for the formation of *OOH intermediates in the 2e − ORR.…”

Section: Introductionmentioning

confidence: 99%

Boron-Doped Biomass Carbon Nanostructures as Electrocatalysts for the Two-Electron Oxygen Reduction Reaction

Xu,

Zhao

et al. 2024

ACS Appl. Nano Mater.

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Highly active B atom dopants were successfully introduced into a biomass carbon matrix as promising electrocatalysts for the two-electron oxygen reduction reaction (2e– ORR) to synthesize hydrogen peroxide (H2O2) by decomposing boron nanosheets with flash Joule heating (FJH) progress. Moreover, the FJH process can greatly improve the graphitization of biomass carbon leading to rapid electron transfer during electrocatalysis. The as-prepared B atom–doped carbon nanomaterial (f-Bs-C) showed greatly enhanced 2e– ORR performance with outstanding H2O2 selectivity (91–94%) at 0.25–0.6 V vs reversible hydrogen electrode (RHE) measured via a rotating ring-disk electrode (RRDE) in an alkaline electrolyte, and the Faradaic efficiency was still greater than 80% during 11 h with a mass activity of 798 mmol gcatalyst –1 h–1 in an actual three-electrode flow cell setup. The overall catalytic performance is preferable to the majority of reported carbon-based catalysts. Density functional theory showed that the O atom connected with B atoms can induce charge density deficiency on the B site acting as high catalytic sites. This research provides an exploration to fabricate heteroatom dopants to enhance the catalytic capability of biomass-based carbon catalysts.

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Section: Introductionmentioning

confidence: 99%

Boron-Doped Biomass Carbon Nanostructures as Electrocatalysts for the Two-Electron Oxygen Reduction Reaction

Xu,

Zhao

et al. 2024

ACS Appl. Nano Mater.

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“…Carbon is the most often used material in non‐metallic materials. The benefits of carbon materials are low cost, high specific surface area, and high pore volume 21‐23 . However, compared with metallic materials, carbon materials have disadvantages such as poor structural stability, poor electrical conductivity, and low efficiency 24,25 .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen peroxide electrosynthesis with nickel foam electrodes: influence mechanism of surface oxidation

Zhao,

Ding,

Zhu

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDNickel foam (NF) is widely used as battery electrode matrix and electrochemical process cathode. However, the surface of NF is prone to oxidation, which may affect its ability to reduce oxygen and produce H2O2, but the influence mechanism is still unclear. In this paper, surface oxidation of the NF was regulated by pickling and drying pretreatment, and the surface oxides were characterized by X‐ray photoelectron spectroscopy (XPS) and energy dispersive X‐ray spectrometry (EDS). The NF was used as the substrate, graphite powder as the catalyst, and PTFE as the binder to prepare graphite‐coated NF composite electrodes. The effect of NF surface oxidation on their ability to generate H2O2 was investigated.RESULTSThe results demonstrated that after pickling and drying, the NF surface generated a large amount of NiO, which increased the charge transfer resistance of the NF by 20.3%, and accelerated further reduction decomposition of H2O2. The rotating ring‐disk electrode (RRDE) tests further confirmed that NiO can reduce the two‐electron oxygen reaction selectivity, which was detrimental to H2O2 electrosynthesis. The graphite‐coated NF composite electrode with pristine NF as the substrate can produce 869.1 mg L−1 of H2O2 and maintain relatively good reusability.CONCLUSIONOverall, the surface oxidation of NF is not conducive to H2O2 electrosynthesis, and it is necessary to prevent oxidation during electrode preparation. This study provides a valuable reference for the preparation of NF electrodes and can promote the further study of in situ H2O2 electrosynthesis. © 2023 Society of Chemical Industry (SCI).

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Enhancement of H2O2 current at electrodes made of Fenton-Activated carbon nanotubes

Lucio-Rivera,

Gudgel,

Smith

et al. 2024

Journal of Electroanalytical Chemistry

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N-doped carbon-based catalysts in situ generation hydrogen peroxide via 2-electron oxygen reduction reaction for degradation of organic contaminants in heterogeneous electro-Fenton process: A mini review

Cited by 4 publications

References 125 publications

Boron-Doped Biomass Carbon Nanostructures as Electrocatalysts for the Two-Electron Oxygen Reduction Reaction

Boron-Doped Biomass Carbon Nanostructures as Electrocatalysts for the Two-Electron Oxygen Reduction Reaction

Hydrogen peroxide electrosynthesis with nickel foam electrodes: influence mechanism of surface oxidation

Enhancement of H2O2 current at electrodes made of Fenton-Activated carbon nanotubes

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