标题: Affordable PbO2 anode on conductive polymer-carbon composite substrates for non-heavy duty use
作者: Zhao, LK (Zhao, Likun); Lv, BX (Lv, Boxue); Wang, ZC (Wang, Zhicheng); Tang, DD (Tang, Dingding); Cui, JX (Cui, Jiaxin); Mao, XH (Mao, Xuhui)
来源出版物: JOURNAL OF ELECTROANALYTICAL CHEMISTRY 卷: 877 文献号: 114610 DOI: 10.1016/j.jelechem.2020.114610 出版年: NOV 15 2020
摘要: The feasibility of using polymer-carbon composite material (PCCM) substrate, instead of titanium substrate, for the preparation of PbO2 electrode was explored. The preparation procedure was optimized to maximize the performance of the PbO2 anodes. Our investigation shows that introducing alpha-PbO2 interlayer could significantly enhance the bonding of the surface beta-PbO2 with the substrate. The addition of fluoride ions in the electrodeposition electrolyte could refine the grain size of the beta-PbO2, resulting in a dense and smooth surface to enhance the service life of the composite anode. Therefore, the electrode PCCM\alpha\F--beta-PbO2, which had a alpha-PbO2 interlayer and a fluoride doped beta-PbO2 surface layer, showed the longest accelerating life. The results of experiments also showed that the current density and deposition time significantly affected the surface morphologies of the PbO2 composite electrode. The optimal condition for the deposition of F--beta-PbO2 surface layer was 1 h of operation at 10 mA/cm(2) current density, and this condition allowed to offer the electrode with a compact surface to prevent the penetration of caustic electrolyte and an appropriate thickness to avoid the strong internal stress. It was also found that the PCCM\alpha\F--beta-PbO2 exhibited the same electrocatalytic activity as that of the Ti-substrate counterpart electrode for the electrochemical oxidation of 2,4-dichlorophenol. This study indicates that the PCCM substrate can be used as an alternative substrate for the preparation of affordable PbO2 anode for non-heavy duty applications.
作者关键词: Polymer-carbon composite material; Electiodeposition; PbO2; Composite electrode; Accelerating life; Non-heavy duty use
地址: [Zhao, Likun; Lv, Boxue; Wang, Zhicheng; Tang, Dingding; Cui, Jiaxin; Mao, Xuhui] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
通讯作者地址: Tang, DD; Mao, XH (通讯作者)，Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.
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