纳米碳材料增强铅基阳极在锌电积中的电化学行为

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

基于纳米碳材料的析氧催化活性,分别研究了典型的0维、1维和2维等6种纳米碳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。结果表明,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500 A/m^(2)恒电流极化条件下,稳定电位较纯铅低96 mV以上。2维纳米碳材料电化学催化性能不如0维纳米碳材料,1维纳米碳材料性能最佳,1维纳米碳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。

Based on the electro-catalysis of nano-carbon materials for oxygen evolving reaction(OER),6 typical 0-dimensional,1-dimensional,and 2-dimensional nano-carbon materials 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 simulated zinc electrowinning conditions.The results show that nano-carbon materials enhanced Pb composite anodes show excellent electrocatalysis for OER and their stable overpotential are lower than that of pure Pb anode by more than 96 mV at the current density of 500 A/m^(2).The electrochemical catalytic performance of 2-dimensional nano-carbon materials is not as well as that of0-dimensional nano-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 nano-carbon materials,the increase of electrochemical catalytic performance is significant.