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以钇稳定氧化锆(YSZ)为固体电解质,Pt作为电极材料,在不同温度下共烧制备了泵氧电极层原型。借助计时电流法和电化学阻抗谱(EIS)法,并结合SEM分析研究了共烧温度对泵氧电极性能的影响。结果表明,随着共烧温度的增加,泵电流先增大后减小,界面电阻先减小后增大,1 400℃共烧电极三相界面(TPB)最长,活性最强;随着共烧温度的增加,电极反应活化能略微降低。虽然1 400℃共烧电极活化能较1 450℃大,但由于其活性区域大,三相界面长,综合表现为1 400℃共烧电极催化活性最强。
Yttrium-stabilized zirconia (YSZ) as solid electrolyte and Pt as electrode material were co-fired to prepare prototype oxygen pump electrode at different temperatures. With the help of chronoamperometry and electrochemical impedance spectroscopy (EIS), combined with SEM analysis, the effect of co-firing temperature on the performance of pump oxygen electrode was investigated. The results show that the pump current first increases and then decreases with increasing co-firing temperature, the interface resistance first decreases and then increases, and the TPB at 1 400 ℃ is the longest and the activity is the highest. Co-firing temperature increases, the electrode activation energy slightly reduced. Although the activation energy of 1 400 ℃ co-fired electrode is larger than 1 450 ℃, the co-fired electrode with 1 400 ℃ has the strongest catalytic activity due to its large active region and long three-phase interface.