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通过极化曲线与电化学阻抗谱测试研究了Ｔｉ基ＩｒＯ２＋Ｔａ２Ｏ５阳极的析氧电催化活性．结果表明， ＩｒＯ２含量为７０％（摩尔分数）时，混合氧化物阳极表面具有最高的析氧活性．这缘于该成分含量阳极中活性组元ＩｒＯ２的真实表面浓度达到最大；而且，由于表面析出晶粒的最细化，在析氧电位下受析出氧气的冲击，该成分阳极表面的活性点数目得到最大程度的提高．由此提出决定氧化物阳极析氧电催化活性的热力学及动力学判据．
The oxygen evolution electrocatalytic activity of Ti-based IrO2 + Ta2O5 anode was investigated by polarization curves and electrochemical impedance spectroscopy. The results show that when the content of IrO2 is 70% (mole fraction), the mixed oxide anode surface has the highest oxygen evolution activity. This is due to the fact that the actual surface concentration of the active component IrO2 in the anode of the composition is maximized; furthermore, due to the thinning of the precipitated grains on the surface, oxygen is attacked at the oxygen evolution potential and the number of active sites on the anode surface of the composition Get the greatest degree of improvement. Based on this, thermodynamic and kinetic criteria for determining the oxygen evolution activity of oxide anodes were proposed.