采用浸渍法和溶胶-凝胶法分别制备了含Mn中间层和SnO2表面催化层,并结合高温热氧化工艺制备了Ti/SnO2和Ti/MnOx/SnO2电催化电极.采用SEM、EDS和XPS等方法对两种电极进行了表征,使用大电流加速寿命实验详细研究了涂层的表面形貌、元素组成和化学态对两种电极稳定性的影响.结果表明:Ti/MnOx/SnO2电极的稳定性是Ti/SnO2电极的4.8倍,涂层使电极的稳定性显著提高.致密的涂层和较多的晶格氧能有效减少或阻止阳极的腐蚀,是电极稳定性提高的主要原因.
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