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.%MnO2 electrode of aluminum substrate was synthesized by means of electrochemical deposition, effects of composition of plating solution, plating time, plating temperature and current density on the electrode catalytic activity and corrosion resistance were studied through orthogonal test Tafel curves and anodic polarization curve, the effects of temperature on the coating morphology were studied. The prepared MnO2 electrode roasted 4 h at 120 °C , 250 °C , 320 °C and 400 °C .respectively. The results show that, the degree of crystallinity of MnO2 calcined at 120 °C and 250 °C increase of 20% than not, and 320 °C and 400 °C roasted some increase;the phase and the crystal did not change significantly. The optimum bath composition and technical conditions of preparation MnC2 electrode of aluminum substrate was obtained: MnSO4 150 g/L, H2 SO4 50 g/L, bath temperature 80℃, current density 3 mA/cm2, plating time 75 min,and calcined for 4 h at 120 °C. The resulting electrode has a better catalytic activity and a strong corrosion resistance. The prepared electrode was γ-MnO2 electrode characterized by XRD, the morphology was spherical deposits characterized by SEM.
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