论文部分内容阅读
采用热分解的方法制备了不同含量石墨烯(graphene)的IrO_2-Ta_2O_5涂层钛阳极(Ti/IrO_2-Ta_2O_5-G),并运用场发射扫描电子显微镜(FESEM)、能谱仪(EDS)等分析手段和循环伏安(CV)、阳极极化及电化学阻抗谱(EIS)等测试方法对阳极的微观结构和电化学性能进行研究。结果表明:Ti/IrO_2-Ta_2O_5-G阳极表面凹凸不平,裂纹细而小,为析氧反应提供了更多的活性中心,电化学活性表面积增大,析氧电催化活性增强;加有不同量石墨烯的Ti/IrO_2-Ta_2O_5-G阳极的电化学性能有一定差别,其中加入0.4 g·L~(-1)石墨烯阳极的电化学性能提高最明显。
The Ti / IrO 2 -Ta 2 O 5 -based titanium anode with different content of graphene was prepared by thermal decomposition method. The emission intensity was measured by field emission scanning electron microscopy (FESEM), energy dispersive spectrometer (EDS), etc. Analytical methods and cyclic voltammetry (CV), anodic polarization and electrochemical impedance spectroscopy (EIS) and other test methods on the anode microstructure and electrochemical properties were studied. The results show that the surface of Ti / IrO_2-Ta_2O_5-G anode is rugged, the cracks are small and small, which provides more active centers for the oxygen evolution reaction. The electrochemically active surface area increases and the electrocatalytic activity of oxygen evolution increases. The electrochemical performance of the graphene Ti / IrO_2-Ta_2O_5-G anode is different from that of the graphene. The electrochemical performance of the graphene anode with graphene of 0.4 g · L -1 increases most obviously.