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合成了LA2-XSRXCUO4+Λ(0≤X≤1)系列类钙钛矿复合氧化物,并作为催化层电极材料制备了空气电极,在碱性介质中以HG/HGO为参比电极测量了电极的极化曲线、循环伏安和交流阻抗,考察了组成对催化剂的电催化活性的影响。研究发现LA2-XSRXCUO4+Λ型类钙钛矿复合氧化物电极材料催化活性较高,并且活性随SR掺杂量的不同活性也有所变化。EIS测试结果表明:不同配比的LA2-XSRXCUO4+Λ型类钙钛矿复合氧化物电极阻抗谱均由一个半圆和一个拖尾直线组成,并提出了空气电极的等效模拟电路,得到了模拟值,对拟合的动力学参数进行了解释。
Synthesis of LA2-XSRXCUO4 + Λ (0≤X≤1) series of perovskite composite oxides, and as the catalytic layer electrode material prepared air electrode, HG / HGO in alkaline medium as the reference electrode measured the electrode The polarization curves, cyclic voltammetry and AC impedance were used to investigate the effect of composition on the electrocatalytic activity of the catalyst. It is found that the catalytic activity of LA2-XSRXCUO4 + Λ type perovskite composite oxide electrode material is high, and the activity varies with the SR activity. The results of EIS show that the impedance spectra of LA2-XSRXCUO4 + Λ-type perovskite composite oxide electrodes with different ratios all consist of a semicircle and a trailing straight line, and the equivalent analog circuit of air electrode is proposed. The simulated Values, the fitted kinetic parameters are explained.