耐酸非贵金属Ti／MO2阳极SnO2＋Sb2O4中间层研究

Study of SnO2+Sb2O4 Intermediate Layer in Non-Noble Metal Ti/MO2 Anode

摘要:

采用热分解法制备了非贵金属Sn02＋Sb204中间层Ti基MO2活性层电极，利用SEM，XRD和XPS方法对中间层进行了表征。测定了Ti／SnO2＋Sb2Od／MnO2和Ti／SnO2＋Sb2O4／PbO2电极在硫酸溶液中的析氧极化曲线，二者起始析氧过电位均比贵金属小；考察了在高电流密度（4A／cm^2）下的加速寿命，二者依次分别达到18h和86h。实验表明，SnO2＋Sb2O4是一种具有良好导电性和结合力的耐酸Ti基MO2电极中间层材料。

Abstract:

Acid-proof Ti based-MO2 anodes with SnO2+Sb2O4 intermediate layer were prepared by thermal decomposition method, the surface characterization of the electrodes were studied by scanning electron microscopy (SEM), elements composition and valence state of SnO2+Sb2O4 intermediate layers were analyzed with X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS), respectively. The polarization curves of oxygen evolution and high density (4 A/cm2) lifetime of Ti/SnO2+ Sb2O4/MnO2 and Ti/ SnO2+Sb2O4/PbO2 anodes were determined in 1.0 mol/L H2SO4 solution. Their potentials of initial oxygen evolution were lower than those of moble metals, and their lifetimes reached 18 h and 86 h, respectively. The experiment showed that the combination of SnO2+Sb2O4 is a better intermediate layer material and will play a important role in Ti/MnO2 and Ti/PbO2 anodes.