采用浸渍还原法分别制备了两种不同铂含量的Pt/C纳米催化剂和Pt - Mn/C、Pt - Co/C纳米合金催化剂,利用XRD和TEM技术对催化剂的粒径大小、晶体结构和晶格常数进行表征,并对四种催化剂进行了循环伏安、线性扫描伏安和电流-时间测试.结果表明:四种催化剂的平均粒径均在10nm以下,且Pt - Mn/C、Pt - Co/C两种合金催化剂的粒径均小于Pt/C催化剂；四种催化剂均为面心立方晶体结构；与Pt/C催化剂相比,两种合金催化剂的晶格常数有所减小,且结晶度较低.电化学性能测试表明,两种Pt合金催化剂较相同Pt载量的纯Pt催化剂具有更高的还原峰电位和更大的还原峰电流,其中Pt - Co/C催化剂的还原峰电位和峰电流最大；在催化剂稳定性方面,两种Pt合金催化剂要优于两种纯Pt催化剂.
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