通过循环伏安法(CV)在玻碳(GC)电极表面电沉积出分布较为均匀的纳米Fe粒子,制得纳米Fe粒子修饰的GC(纳米Fe/GC)电极,再经"电荷置换"制得具有Fe核Pt壳结构的纳米粒子修饰的(纳米PtFe/GC)电极. SEM结果显示,纳米Fe/GC和纳米PtFe/GC表面粒子的形貌均呈立方体形,分布较为均匀,粒径在60 nm左右. 纳米PtFe/GC电极对亚硝酸盐的还原具有很高的电催化活性. 3种电极的电催化活性顺序依次为:纳米Fe/GC<纳米Pt/GC<纳米PtFe/GC. 相对于纳米Pt/GC电极,纳米PtFe/GC电极的起始还原电位(Ei)正移了0.14 V,还原峰电流(ip)增大了3倍.
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