热处理温度对Ti/SnO2 + SbOx / MnOx阳极析氧催化性能的影响
Effect of Heat Treatment on Electrocatalytic Activity of Ti / SnO2 + SbOx / MnOx Anode
朱承飞, 高 红, 解 瑞, 王晓钧
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作者单位：(南京工业大学 材料科学与工程学院, 江苏 南京 210009)
中文关键字：氧化锰； 热处理； 钛阳极； 析氧催化
英文关键字：manganese oxide; heat treatment; Ti anode; OER
中文摘要：采用电沉积法在硫酸锰溶液中制备了钛基二氧化锰电极，研究了热处理温度(100～500 ℃)对Ti/SnO2+SbOx / MnOx电极析氧电催化性能的影响。采用X射线衍射、红外光谱分析方法对电极结构进行了表征，通过极化曲线、循环伏安曲线和电化学阻抗研究了电极在0.5 mol/L K2SO4溶液中的析氧催化活性。结果表明，热处理温度为200 ℃时，没有改变其γ-MnO2晶型，但是Mn-O键力增强，析氧催化活性提高；200 ℃以上的热处理改变了MnOx晶型，但对改善电极析氧催化性能效果不明显。
英文摘要：Titanium based manganese oxide electrode was prepared by electro-dip process in manganese sulphate solution. The effect of heat treatment (100 ℃～500 ℃) on the eletrocatalytic performance of oxygen evolution reaction(OER) was investigated. The microstructure of the manganese oxide was examined by X-ray diffraction and IR. The eletrocatalytic performance of the oxygen evolution reaction(OER) of the anodes in 0.5 mol/L K2SO4 soulution was carried out by polarization curves, cyclic voltammetry and electrochemical impedance spectroscopies(EIS). It is found that when the heat treating temperature is 200℃, γ-MnO2 structure does not change, but the force of Mn-O bond strengthens, the OER properties improve. There is no obvious improvement in the OER properties when heat treating above 200 ℃.