Efficient electro-Fenton catalysis by self-supported CFP@CoFe2O4 electrode

Meiting Guo; Mingjie Lu; Heng Zhao; Feifei Lin; Fengting He; Jinqiang Zhang; Shuaijun Wang; Pei Dong; Chaocheng Zhao

doi:10.1016/j.jhazmat.2021.127033

Efficient electro-Fenton catalysis by self-supported CFP@CoFe₂O₄ electrode

J Hazard Mater. 2022 Feb 5;423(Pt A):127033. doi: 10.1016/j.jhazmat.2021.127033. Epub 2021 Aug 25.

Authors

Meiting Guo¹, Mingjie Lu¹, Heng Zhao¹, Feifei Lin¹, Fengting He¹, Jinqiang Zhang², Shuaijun Wang³, Pei Dong⁴, Chaocheng Zhao⁵

Affiliations

¹ State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China.
² School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia.
³ School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.
⁴ State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China. Electronic address: dongpei1016upc@163.com.
⁵ State Key Laboratory of Petroleum Pollution Control, China University of Petroleum (East China), Qingdao 266580, PR China. Electronic address: zhaochch0821@163.com.

PMID: 34481397
DOI: 10.1016/j.jhazmat.2021.127033

Abstract

In this work, the bimetallic iron oxide self-supported electrode was prepared by a simple solvothermal as well as thermal method. CoFe₂O₄ magnetic nanoparticles were grown in situ on the CFP surface and characterized to reveal the morphology, composition, and electrochemical properties of the electrode. Compared to CFP and CFP@Co-Fe, CFP@CoFe₂O₄ equipped more efficient mineralization current efficiency and lower energy consumption due to the improved electrocatalytic capacity of CoFe₂O₄ properly grown on the conductive substrate surface. Further studies showed that the manufactured electrode maintained a high level of stability after continuous operation. According to the free radical trapping experiment, EPR, and liquid mass spectrometry analysis, the rational reaction mechanism of p-nitrophenol was finally proposed, in which ·OH and SO₄·^- were considered as the main active oxidants. This work demonstrated the great potential of establishing an electro-Fenton system based on CoFe₂O₄ immobilized self-supporting cathode for environmental remediation.

Keywords: CFP@CoFe(2)O(4); Catalytic oxidation; Degradation; Heterogeneous electro-Fenton; Self-supported electrode.