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Electrochemical Degradation of 4-Fluorophenol in a Moveable Pd-Polypyrrole Catalyst-Mediated Reactor

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Abstract

Electrochemical redox is an effective method to degrade halogenated organic pollutants (HOPs). Herein, highly dispersed Pd-polypyrrole (Pd-PPy) catalysts were synthesized by a facile one-step polymerization method. The morphology and phase structure of the catalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The electrochemical redox of 4-fluorophenol (4-FP) was conducted in a single-chamber reactor with Pd-PPy as a moveable catalyst. The effects of the initial solution pH, constant current, and supporting electrolyte on the degradation of 4-FP were investigated. The removal efficiency of 4-FP was 84.6% after 2 h under an initial solution pH of 2.5 and an applied current density of 2.0 mA/cm2. The mechanism of 4-FP degradation was inferred, including the defluorination of 4-FP on the cathode and oxidation of 4-FP and phenol on the anode. The degradation of 4-FP in the Pd-PPy-mediated reactor showed lower energy consumption and higher removal efficiency. The degradation efficiency of 4-FP had almost no change after 20 cycles of experiments, which indicates the good durability of the prepared Pd-PPy catalysts.

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Funding

This work was supported by the National Natural Science Foundation of China (21403058, 21576073, and 41601520) and the Key Scientific Research Projects of Higher Education Institutions in Henan Province (20A610001).

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Authors and Affiliations

  1. College of Chemical Engineering & Pharmaceutics, Henan University of Science and Technology, Luoyang, 471023, People’s Republic of China

    Yadan Yang, Xuefeng Wei, Juan Miao, Ruichang Zhang, Hang Xu, Junhui Liu & Shufa Zhu

  2. Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology, Luoyang, 471023, People’s Republic of China

    Juan Miao & Hang Xu

  3. Luoyang Key Laboratory of Soil Pollution Remediation Project, Henan University of Science and Technology, Luoyang, 471023, People’s Republic of China

    Xuefeng Wei, Ruichang Zhang, Junhui Liu & Shufa Zhu

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  1. Yadan Yang
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  2. Xuefeng Wei
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Correspondence to Xuefeng Wei, Junhui Liu or Shufa Zhu.

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Yang, Y., Wei, X., Miao, J. et al. Electrochemical Degradation of 4-Fluorophenol in a Moveable Pd-Polypyrrole Catalyst-Mediated Reactor. Electrocatalysis 13, 81–90 (2022). https://doi.org/10.1007/s12678-021-00696-1

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