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首页> 外文期刊>RSC Advances >alpha(beta)-PbO2 doped with Co3O4 and CNT porous composite materials with enhanced electrocatalytic activity for zinc electrowinning
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alpha(beta)-PbO2 doped with Co3O4 and CNT porous composite materials with enhanced electrocatalytic activity for zinc electrowinning

机译：α（β）-pbo2掺杂有CO3O4和CNT多孔复合材料，具有增强的电催化活性，用于锌电荷

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摘要

The high energy consumption during zinc electrowinning is mainly caused by the high overpotential of the oxygen evolution for Pb-Ag alloys with strong polarization. The preparation of new active energy-saving materials has become a very active research field, depending on the synergistic effects of active particles and active oxides. In this research, a composite material, alpha(beta)-PbO2, doped with Co3O4 and CNTs on the porous Ti substrate was prepared via one-step electrochemical deposition and the corresponding electrochemical performance was investigated in simulated zinc electrowinning solution. The composite material showed a porous structure, finer grain size and larger electrochemical surface area (ECSA), which indicated excellent electrocatalytic activity. Compared with the Pb-0.76 wt% Ag alloy, the overpotential of oxygen evolution for the 3D-Ti/PbO2/Co3O4-CNTs composite material was decreased by about 452 mV under the current density of 500 A m(-2) in the simulated zinc electrowinning solution. The decrease in the overpotential of oxygen evolution was mainly ascribed to the higher ECSA and lower charger transfer resistance. Moreover, it showed the lowest self-corrosion current density of 1.156 x 10(-4) A cm(-2) and may be an ideal material for use in zinc electrowinning.
机译：锌电宁期间的高能耗主要是由具有强极化的PB-Ag合金的氧化的高度过电位引起。新的活性节能材料的制备已成为一个非常活跃的研究领域，这取决于活性颗粒和活性氧化物的协同效应。在该研究中，通过一步电化学沉积制备掺杂用CO 3 O 4和多孔Ti衬底上的CNT和CNT的复合材料，α（β）-pBO 2，并在模拟锌电催化溶液中研究了相应的电化学性能。复合材料显示多孔结构，细粒尺寸和较大的电化学表面积（ECSA），其表明优异的电催化活性。与PB-0.76wt％Ag合金相比，3D-Ti / PbO2 / Co3O4-CNTS复合材料的过电位在模拟中的500μm（-2）的电流密度下降低约452mV。锌电陶瓷溶液。氧气进化的过调谐的降低主要归因于更高的ECSA和更低的充电器转移性。此外，它显示出最低的自腐蚀电流密度为1.156×10（-4）厘米（-2），并且可以是用于锌电锌的理想材料。

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  • 来源
    《RSC Advances》 |2020年第3期|共10页
  • 作者

    Wang Xuanbing; Xu Ruidong; Feng Suyang; Yu Bohao; Chen Buming;

  • 作者单位

    Kunming Univ Sci &

    Technol State Key Lab Complex Nonferrous Met Resources Cl Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci &

    Technol State Key Lab Complex Nonferrous Met Resources Cl Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci &

    Technol State Key Lab Complex Nonferrous Met Resources Cl Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci &

    Technol Fac Met &

    Energy Engn Kunming 650093 Yunnan Peoples R China;

    Kunming Univ Sci &

    Technol Fac Met &

    Energy Engn Kunming 650093 Yunnan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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