以NiCl2·6H2O,CoCl2·6H2O和草酸为原料,利用氨水为配位剂和溶液pH调节剂,通过配位共沉淀-热分解法制备了棒状多孔NiCo2O4粉末,采用X射线衍射、扫描电镜、透射电镜以及比表面积仪对前驱体和NiCo2O4粉末的形貌和结构进行了表征,考察了溶液pH对前驱体粉末形貌和分散性的影响;采用循环伏安法和计时电流法研究了乙醇在棒状多孔NiCo2O4粉末修饰的玻碳电极上的电催化性能.结果表明:前驱体的形貌与溶液的pH有关,热分解得到的NiCo2O4粉末继承了前驱体形貌,呈多孔棒状,比表面积为89 m2/g,平均孔径为12.56 nm.该粉末对乙醇具有良好的电催化活性,氧化峰电流与乙醇浓度、扫速的平方根均呈直线关系,表明棒状多孔NiCo2O4粉末对乙醇的催化反应机理为扩散控制.
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