中文摘要：

研究了MnOx活性层焙烧温度对Ti／SnO2＋Sb2O3／MnOx电极性能的影响．用XRD、SEM对电极活性层的结构、形貌进行了表征，通过极化曲线和循环伏安曲线研究了电极在25℃1．0mol／LH2SO4溶液中的电催化活性，并应用阳极快速寿命检测法测定了电极寿命．结果表明：焙烧温度为200℃时，只有β-MnO2生成；焙烧温度在300和400℃之间时，同时有α-Mn2O3和伊MnO2晶体生成，即在该温度范围内，α-Mn2O3和β-MnO2共存；焙烧温度高于450℃时，在实验条件下，只有α-Mn2O3的衍射峰．焙烧温度对电极电催化活性和电极寿命有显著的影响，α-Mn2O3和伊MnO2共存时电极具有较低的析氧电位．焙烧温度为400℃时制备的电极电催化活性较高，快速寿命检测法测得其电极寿命达39h，具有良好的稳定性．

英文摘要：

MnOx coatings deposited on a Ti/SnO2＋Sb2O3 were prepared by the thermal decomposition of Mn（NO3）2. Surface morphology and microstructure of the coating were investigated by X-ray diffraction and scanning electron microscopy. The electrocatalytic activity of the anodes was assessed by polarization curves and voltammetric charge at 25℃ and 1.0mol/L in aqueous H2SO4, and accelerated life tests were performed at 60℃ and 1.0mol/L in aqueous H2SO4 with an anodic current density of 4.0A/cm^2. The aim of this work was to prepare anodes based on ternary oxides showing high stability and electro-catalytic activity in acid solution. The XRD analysis reveals that β-MnO2 is formed at 200℃, after that, β-MnO2 and α-Mn2O3 coexist between 300℃ and 400℃ and above 450℃ main composition is α-Mn2O3. It is suggested that calcination temperatures affect the electro-catalytic activity and the lifetime of the anodes. The anode possesses relatively low overpotential, when the coexistence of β-MnO2 and α-Mn2O3. The Ti/SnO2＋Sb2O3/MnOx electrode, the MnOx coatings prepared at 400℃, exhibits excellent electrocatalytic activity and higher coating stability with accelerated life of 39h.