采用改进的电化学三步法制备铂钌/多壁碳纳米管(PtRu/MWCNTs)和铂钌镍/多壁碳纳米管(PtRuNi/MWCNTs)金属纳米复合材料,用透射电子显微镜、能量色散光谱、X射线多晶衍射和X光电子能谱对其形貌、成分和结构进行表征和分析.采用循环伏安法和计时电流法研究PtRu/MWCNTs和PtRuNi/MWCNTs金属纳米复合材料对O还原(ORR)和甲醇氧化的电催化活性和稳定性.结果表明,PtRuNi/MWCNTs的ORR起始电位发生明显正移,峰电流增高,甲醇氧化峰电流高,氧化峰电位负移,具有高抗CO中毒性能且稳定性好,是良好的直接甲醇氧化燃料电池阳极催化剂候选材料.同时,PtRuNi/MWCNTs的高ORR和甲醇氧化电催化活性,是双功能工作理论、特殊三维结构和MWCNTs表面经电化学活化处理生成含O官能团多种因素的共同作用结果.
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