INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Enhanced Stability of the Modified PbO2 Electrode for Electrochemical Catalysis |
LIU Jicheng1, YANG Renkai1,2,*, CHEN Guisheng3, SUN Si3, HAN Xiaoyu3, TIAN Jie3, LI Xiaolin4,*
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1 Chongqing Water Group Co., Ltd., Chongqing 400015, China 2 College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China 3 Chongqing Three Gorges Water Service Co., Ltd., Chongqing 401122, China 4 College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China |
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Abstract Lead dioxide (PbO2) has been regarded as a promising anodic material with superior activity for electrochemical degradation of the organic waste water. However, the PbO2 electrode usually suffers from poor stability and the leached lead ions can cause even more serious pollution to the environment. In this work, to enhance the stability of the PbO2 electrode, a 10.0 μm of α-PbO2 thin film is deposited into the Ti/SnO2-Sb2O3/β-PbO2 electrode. The α-PbO2 layer can not only increase the lattice matching between the SnO2-Sb2O3 and the β-PbO2 layer but also decrease the internal stress between two different films. With the addition of α-PbO2 thin film, the Ti/SnO2-Sb2O3/α-PbO2/β-PbO2 modified electrode shows almost the same electrocatalytic activity as the Ti/SnO2-Sb2O3/β-PbO2 electrode, but the stability is greatly improved. In the electrochemical oxidation of toluene diamine (TDA), the modified electrode with the α-PbO2 film could stay at a current density of 2.0 A/cm2 for as long as 750 min in a 4.0 mol/L H2SO4 solution, which was 1.56 times longer than that of the Ti/SnO2-Sb2O3/β-PbO2 electrode. The degradation pathway of TDA was also studied in detail. This work reports a facil and promising way to stabilize the modified PbO2 electrode for electrochemical degradation of organic pollutants.
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Published: 25 April 2023
Online: 2023-04-24
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Fund:National Natural Science Foundation of China (21675131). |
Corresponding Authors:
*Renkai Yang, corresponding author, graduated from Chongqing University with a master's degree in chemical engineering in July 2013. Now, he is a senior engineer of Chongqing Water Group Co., Ltd and a Ph. D candidate of chemical engineering and technology in Chongqing University. He is mainly engaged in the research of water pollution prevention technology and the operation and management of sewage treatment plants.yangrk@cqu.edu.cn Xiaolin Li, corresponding author, is a lecturer at School of Chemistry and Chemical Engineering, Southwest University. He graduated from Chongqing University with a bachelor's degree in materials chemistry in 2010 and graduated with a Ph.D. degree in chemical engineering and technology from the School of Chemistry and Chemical Engineering, Chongqing University. Du-ring the doctoral period, he went to the University of Missouri and Yale University for exchange and study. He mainly focuses on the preparation of nanomaterials and their application in electrocatalysis. As the first or corresponding author, he has published 10 research works in ACS Catalysis, Nano Letters, Journal of Catalysis, Electronica Acta, International Journal of Hydrogen Energy, Journal of Alloys and Compounds, Journal of Solid State Chemistry, Applied Surface Science and other journals.xiaolinli@swu.edu.cn
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About author: Jicheng Liu received his B. S. degree from Jinan University in 2003, and now is a senior engineer at Chongqing Water Affairs Group Co., Ltd. He focuses on the research of water supply and drainage theory and technology, and the development of water purification materials. |
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