Electrocatalytic transformation of oxygen to hydroxyl radicals via three-electron pathway using nitrogen-doped carbon nanotube-encapsulated nickel nanocatalysts for effective organic decontamination

Li, Mohua; Bai, Liang; Jiang, Shengtao; Liu, Yanbiao

doi:10.1016/j.jhazmat.2023.131352

“…The distinct advantage of EF lies in its capacity to in situ generate H 2 O 2 , mitigating the need for dosing procedures and reducing potential risks. The EF process entails two essential reactions: in situ H 2 O 2 production and Fenton reaction, governed by the following equations , O 2 + 2 H + + 2 e − → H 2 O 2 normalF e 2 + + H 2 O 2 → F e 3 + + O H − + normalO normalH • …”

Section: Introductionmentioning

confidence: 99%

Recyclable Binder-free 3D LaFeO₃@TiO₂-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H₂O₂

Wang,

Chen,

Liu

et al. 2023

Ind. Eng. Chem. Res.

0

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In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

Wang,

Hu,

Wang

et al. 2024

Angewandte Chemie

0

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The electro‐Fenton (EF) process is an advanced oxidation technology with significant potential; however, it is limited by two steps: generation and activation of H2O2. In contrast to the production of H2O2 via the electrochemical two‐electron oxygen reduction reaction (ORR), the electrochemical three‐electron (3e‐) ORR can directly activate molecular oxygen to yield the hydroxyl radical (·OH), thus breaking through the conceptual and operational limitations of the traditional EF reaction. Therefore, the 3e‐ ORR is a vital process for efficiently producing ·OH in situ, thus charting a new path toward the development of green water‐treatment technologies. This review summarizes the characteristics and mechanisms of the 3e‐ ORR, focusing on the basic principles and latest progress in the in situ generation and efficient utilization of ·OH through the modulation of the reaction pathway, shedding light on the rational design of 3e‐ ORR catalysts, mechanistic exploration, and practical applications for water treatment. Finally, the future developments and challenges of efficient, stable, and large‐scale utilization of ·OH are discussed based on achieving optimal 3e‐ ORR regulation and the potential to combine it with other technologies.

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In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

Wang,

Hu,

Wang

et al. 2024

Angew Chem Int Ed

0

View full text Add to dashboard Cite

The electro‐Fenton (EF) process is an advanced oxidation technology with significant potential; however, it is limited by two steps: generation and activation of H2O2. In contrast to the production of H2O2 via the electrochemical two‐electron oxygen reduction reaction (ORR), the electrochemical three‐electron (3e‐) ORR can directly activate molecular oxygen to yield the hydroxyl radical (·OH), thus breaking through the conceptual and operational limitations of the traditional EF reaction. Therefore, the 3e‐ ORR is a vital process for efficiently producing ·OH in situ, thus charting a new path toward the development of green water‐treatment technologies. This review summarizes the characteristics and mechanisms of the 3e‐ ORR, focusing on the basic principles and latest progress in the in situ generation and efficient utilization of ·OH through the modulation of the reaction pathway, shedding light on the rational design of 3e‐ ORR catalysts, mechanistic exploration, and practical applications for water treatment. Finally, the future developments and challenges of efficient, stable, and large‐scale utilization of ·OH are discussed based on achieving optimal 3e‐ ORR regulation and the potential to combine it with other technologies.

show abstract

Electrocatalytic transformation of oxygen to hydroxyl radicals via three-electron pathway using nitrogen-doped carbon nanotube-encapsulated nickel nanocatalysts for effective organic decontamination

Cited by 17 publications

References 51 publications

Recyclable Binder-free 3D LaFeO₃@TiO₂-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H₂O₂

Recyclable Binder-free 3D LaFeO₃@TiO₂-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H₂O₂

In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

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Electrocatalytic transformation of oxygen to hydroxyl radicals via three-electron pathway using nitrogen-doped carbon nanotube-encapsulated nickel nanocatalysts for effective organic decontamination

Cited by 17 publications

References 51 publications

Recyclable Binder-free 3D LaFeO3@TiO2-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H2O2

Recyclable Binder-free 3D LaFeO3@TiO2-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H2O2

In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

In Situ Production of Hydroxyl Radicals via Three‐Electron Oxygen Reduction: Opportunities for Water Treatment

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Product

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Recyclable Binder-free 3D LaFeO₃@TiO₂-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H₂O₂

Recyclable Binder-free 3D LaFeO₃@TiO₂-NTs Heterostructure Catalysts for the Enhanced Degradation of Tetracycline via In Situ Produced H₂O₂