Citation: Ziliang Wei, Haolin Xu, Zhenchao Lei, Xiaoyun Yi, Chunhua Feng, Zhi Dang. A binder-free electrode for efficient H₂O₂ formation and Fe²⁺ regeneration and its application to an electro-Fenton process for removing organics in iron-laden acid wastewater[J]. Chinese Chemical Letters, ;2022, 33(2): 920-925. doi: 10.1016/j.cclet.2021.07.006 shu

A binder-free electrode for efficient H₂O₂ formation and Fe²⁺ regeneration and its application to an electro-Fenton process for removing organics in iron-laden acid wastewater

The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China

chfeng@scut.edu.cn

Received Date: 17 May 2021
Revised Date: 16 June 2021
Accepted Date: 2 July 2021
Available Online: 13 July 2021

Figures(4)

The electro-Fenton process, with its capacity for in-situ H₂O₂ formation and Fe²⁺ regeneration, is a striking alternative to the traditional chemical-Fenton process. However, the frequent requirement of extra binders for electrode fabrication leads to low catalyst utilization, a complex fabrication process, and weak conductivity. Herein, a three-dimensional (3D) porous electrode was fabricated in-situ on a Ni foam (NF) substrate integrated with nitrogen-doped carbon nanotubes (N@C) derived from carbonization of zeolitic imidazolate framework-8 (ZIF-8) without any binder. The resulting 900/N@C-NF cathode (synthesized at 900 ℃) was high in surface area, N content, and degree of graphitization, achieved high performance of H₂O₂ production (2.58 mg L⁻¹ h^-1 H₂O₂/mg catalyst) at -0.7 V (vs. SCE), and enabled prompt regeneration of Fe²⁺. The electro-Fenton system equipped with the 900/N@C-NF cathode was effective in removing a diverse range of organic pollutants, including rhodamine B (RhB), phenol, bisphenol A (BPA), nitrobenzene (NB), and Cu-ethylenediaminetetraacetic acid (EDTA), and significantly attenuating the concentration of chemical oxygen demand (COD) in the real acid wastewater, exhibiting superior activity and stability. This binder-free and self-supporting electro-Fenton cathode was thus shown to be an attractive candidate for application to wastewater treatment, particularly those rich in organics, acids, and Fe³⁺/Fe²⁺.
- Binder-free electrode,
- Oxygen reduction reaction,
- N-doped carbon nanotubes,
- Fe²⁺ regeneration,
- Acid wastewater treatment
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A binder-free electrode for efficient H2O2 formation and Fe2+ regeneration and its application to an electro-Fenton process for removing organics in iron-laden acid wastewater

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通讯作者: 陈斌, bchen63@163.com

A binder-free electrode for efficient H₂O₂ formation and Fe²⁺ regeneration and its application to an electro-Fenton process for removing organics in iron-laden acid wastewater