中文摘要：

采用热分解法制备了以钛为基体、SnO2＋Sb2O3为中间层、RuO2＋PbO2为活性层的Ti／SnO2＋Sb2O3／RuO2＋PbO2电极。应用极化曲线法和循环伏安法测定不同RuO2含量下电极在25℃，0．5mol／LH2SO4溶液中的电催化活性。实验结果表明，随着RuO2含量的增加，相同电极电位下的电流密度增大；相同的扫描速率下，RuO2含量增加，电极的伏安电荷值增加，即电极的电催化活性随着RuO2含量的增加而增加。在1．0mol／LH2SO4溶液中，60℃、电流密度为2．0A／cm^2条件下，电极寿命快速检测结果表明，Ti／SnO2＋Sb2O3／RuO2＋PbO2电极的寿命随RuO2含量的增加而下降；但与不加有SnO2＋Sb2O3中间层的Ti／RuO2＋PbO2电极相比，电极寿命则显著增加。RuO2的含量还对电极的表面形貌有明显的影响。

英文摘要：

The RuOz＋PbO2 coatings deposited on a Ti/SnO2＋Sb2O3 have been prepared by the thermal decomposition of RuCl3＋Pb（NO3）2. The surface morphology and microstructure of the coating were investigated by scanning electron microscopy. The electrocatalytic activity of the anodes was assessed by polarization curves and voltammetric charge at 25 ℃ and 1.0 mol/L in aqueous H2SO4. The results show that the current density on the Ti/SnO2＋Sb2O3/RuO2＋PbO2 electrodes increases at a constant electrode potential and the voltammetric charge also increases at a constant scanning rate with increasing the content of RuO2, it means that the electrocatalytic activity of the electrodes rises when RuO2 content increases. Accelerated life tests were performed at 60℃ and 1.0 mol/L in aqueous H2SO4 with an anodic current of 2.0 A/cm^2. The experimental results show that the accelerated lifetime decreases with increasing RuO2 content, but comparing with the electrodes without an intermediate layer, the accelerated lifetime of Ti/SnO2＋Sb2O3/RuO2＋PbO2 electrodes is prolonged obviously. The SEM analysis reveals that surfaces of the electrodes take on a variety of morphology with variation of the content of RuO2, which probably affect the electrocatalytic activity and the lifetime of the anodes.