改性PbO<sub>2</sub>电极电化学催化裂解的稳定性研究

doi:10.11896/cldb.21080035

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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.

Key words： electrochemical degradation modified PbO₂ electrode α-PbO₂ stability toluene diamine

Published: 25 April 2023 Online: 2023-04-24

CLC number:

O646.51

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

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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	LIU Jicheng
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Cite this article:

LIU Jicheng,YANG Renkai,CHEN Guisheng, et al. Enhanced Stability of the Modified PbO₂ Electrode for Electrochemical Catalysis[J]. Materials Reports, 2023, 37(8): 21080035-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21080035 OR http://www.mater-rep.com/EN/Y2023/V37/I8/21080035

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