Issue 27, 2018, Issue in Progress

Highly efficient degradation of phenol from wastewater via an electro-catalytic oxidation approach with a CeO2–CuO cathode

Abstract

The development of highly efficient cathode materials for the electro-catalytic oxidation of phenol from wastewater is of vital importance for environment protection. Herein, we develop an effective CeO2–CuO electrocatalyst for 2-electron oxygen reduction reaction (ORR) to generate H2O2, and then applied it as the cathode for the electro-catalytic oxidation of phenol. Results showed that the CeO2–CuO cathode with different contents of CuO exhibited a higher yield of H2O2 than those of CuO and CeO2, and the highest yield of H2O2 (114 mg L−1) was achieved with a CuO content of 13.4%. The resultant CeO2–CuO-13.4% cathode demonstrated a high degradation rate of 91% after 180 min, which was 1.82-fold and 1.52-fold higher than pure CuO (50%) and CeO2 (60%) electrodes, respectively. Furthermore, the degradation rate of phenol via the electro-catalytic oxidation technology by using a CeO2–CuO cathode significantly outperformed that of the chemical oxidation approach. The outstanding degradation performance of the CeO2–CuO cathode is attributed to the high yield of H2O2 and the strong interaction of CeO2 and CuO.

Graphical abstract: Highly efficient degradation of phenol from wastewater via an electro-catalytic oxidation approach with a CeO2–CuO cathode

Article information

Article type
Paper
Submitted
01 Feb 2018
Accepted
10 Apr 2018
First published
23 Apr 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 15167-15172

Highly efficient degradation of phenol from wastewater via an electro-catalytic oxidation approach with a CeO2–CuO cathode

J. Luo, H. Zhang and Z. Li, RSC Adv., 2018, 8, 15167 DOI: 10.1039/C8RA00983J

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