采用电沉积法制备铝基MnO2电极,通过Tafel曲线、阳极极化曲线考察了镀液组成、施镀时间、施镀温度、电流密度对电极催化活性和耐蚀性的影响.考察了温度对镀层形貌的影响,最优条件下制备的MnO2电极分别在120℃、250℃、320℃和400℃条件下焙烧4h,结果表明,在120℃和250℃焙烧所得MnO2的结晶程度比不焙烧时增大了20%,而320℃和400℃焙烧所得MnO2的结晶程度比不焙烧时略有增加;物相和晶型都没有发生明显变化.因此得出制备铝基MnO2电极的最佳镀液组成和工艺条件为:MnSO4·H2O 150 g/L,H2SO4 50 g/L,温度80℃,电流密度3 mA/cm2,施镀时间75 min,120℃焙烧4h.所得电极催化活性较好,耐蚀性较强.经XRD表征主要晶型为γ-MnO2,SEM表征为球状堆积物.
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