纳米碳材料增强铅基阳极在锌电积中的电化学行为

锌电积作为湿法炼锌的重要环节，其阳极析氧电位对于节能降耗和提高产品质量极为重要。基于纳米碳材料的析氧催化活性，本文分别研究了典型的0维、1维和2维等6种碳纳米材料作为催化增强相制备铅基复合阳极，并在模拟锌电积条件下通过循环伏安曲线、阳极极化、交流阻抗测试以及耐蚀测试比较了复合阳极的电化学行为。纳米碳材料作为增强相掺杂金属铅形成的金属基复合材料表现出优异的析氧电催化活性，其在500A/m2恒电流极化条件下，稳定电位较纯铅低96mV以上。2维碳材料电化学催化性能不如0维碳材料，1维材料性能最佳，1维材料表面修饰官能团或者负载功能颗粒后，电催化性能有显著提升。

Electrochemical Behavior of Nano-Carbon Materials Enhanced Pb Anodes for Zinc Electrowinning

The electrowinning process plays a substantial role in zinc hydrometallurgy, and its oxygen evolving potential on anode is critical for energy saving and high-quality metallic zinc. Based on the electro-catalysis of carbon nano-materials for oxygen evolving reaction (OER), 6 typical 0-dimensional, 1-dimensional, and 2-dimensional carbon nanomaterials were used as the catalytic enhanced phase to prepare lead-based composite anodes. The electrochemical behavior of the composite anode was studied by cyclic voltammetry, anodic polarization, EIS and corrosion resistant test under zinc electrowinning conditions. Nano-carbon materials enhanced Pb composite anodes show excellent electrocatalysis for OER and their stable overpotetntial are lower than pure Pb anode by more than 96mV under current density of 500A/m2. The electrochemical catalytic performance of 2-dimensional carbon materials is not as well as that of 0-dimensional carbon materials, and the 1-dimensional ones have the best performance among them. After modified with functional groups or decorated with functional particles on the surface of 1-dimensional carbon materials, the increase of electrochemical catalytic performance was significant.