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电化学  2014 

铂纳米晶的合成及其甲醇电催化性能

DOI: 10.13208/j.electrochem.130710, PP. 171-176

Keywords: 铂纳米晶,草酰胺,直接甲醇燃料电池,电催化

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Abstract:

以草酰胺作为保护剂,采用胶体法合成铂纳米晶,考察了不同溶液pH值、前驱体与保护剂反应物配比对铂纳米晶形貌及其甲醇电催化氧化活性的影响.测试表明,pH=5、反应物配比1:20合成的铂纳米晶的甲醇电催化氧化活性最佳,其峰电流密度达到1709μA·cm-2.空气中搁置3个月后,其表面形貌变化不大,但甲醇的电催化活性显著降低.0.05~1.2V电位范围循环扫描100周期,其循环伏安曲线明显变化,晶体表面原子排列方式也发生变化,由易毒化(100)面逐渐转化为(110)面,其甲醇电催化活性增加.

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