The recent progress of cathode materials for heterogeneous electro-Fenton reactions

Xixi Wang, Chao Xu, Yuan Zhu, Chuan Zhou, Yang Yang, Jie Miao, Wei Zhou, Zongping Shao

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

As one of environmentally friendly and efficient oxidation techniques, the electro-Fenton (EF) processes allow to remove and mineralize organic pollutants. However, the transitional EF processes require an acidic environment, adding ferrous ions, treatment of iron sludge, and costly solution pH adjustment. Heterogeneous EF (hetero-EF) processes enable EF to function over a broad working pH region and recycle across multiple reaction rounds which reduces overall cost and displays great potential for practical engineering applications. Here, this work reviewed the reported cathode materials for the hetero-EF processes. We firstly described the mechanisms of homogeneous and heterogeneous EF reactions. Then, we summarized different types of cathode materials for hetero-EF reactions, including metal-free carbon materials, transition metal single-atom catalysts (SACs)/carbon materials, alloys catalysts/carbon materials, metal compounds/carbon materials and other materials. Finally, we overviewed the challenges and proposal strategies of hetero-EF technique in order to expand its wide-scale applicability and practical significance for advanced wastewater treatment.

Original languageEnglish
Article number103820
JournalSurfaces and Interfaces
Volume44
DOIs
StatePublished - Jan 2024

Keywords

  • Cathode materials
  • HO activation
  • HO generation
  • Heterogeneous electro-Fenton reactions
  • Reactive oxygen species

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