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采用热分解法制备了加有一定量石墨烯(graphene)的Ir O2-Ta2O5涂层钛阳极(Ti/IrO2-Ta2O5-G),并运用场发射扫描电镜、能谱仪等分析手段和循环伏安、电化学阻抗谱、强化电解寿命等测试方法对阳极失效前后的微观形貌和电化学性能进行研究。结果表明:与传统的Ti/IrO2-Ta2O5阳极相比,Ti/IrO2-Ta2O5-G阳极在强化电解过程中槽压呈逐渐上升趋势,具有更长的强化电解寿命;涂层破损导致催化活性组分减少是Ti/IrO2-Ta2O5-G阳极失效的主要原因;失效后的Ti/IrO2-Ta2O5-G阳极仍具有一定的电催化活性。
An Ir O2-Ta2O5-coated titanium anode (Ti / IrO2-Ta2O5-G) with a certain amount of graphene was prepared by thermal decomposition method. The emission intensity of the anode was measured by field emission scanning electron microscopy, energy dispersive spectroscopy and cyclic voltammetry , Electrochemical impedance spectroscopy, enhanced electrolytic life test methods such as before and after the failure of the anode morphology and electrochemical properties were studied. The results show that, compared with the conventional Ti / IrO2-Ta2O5 anodes, the Ti / IrO2-Ta2O5-G anodes have a tendency of increasing the bath pressure during the electrolysis and have a longer electrolytic life; the damaged coating leads to the catalytic activity The decrease of Ti / IrO2-Ta2O5-G anode is the main reason for the failure of the anode. The Ti / IrO2-Ta2O5-G anode still has some electrocatalytic activity.