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首页> 外文期刊>Journal of power sources >Platinum nanoparticles supported on activated carbon fiber as catalyst for methanol oxidation
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Platinum nanoparticles supported on activated carbon fiber as catalyst for methanol oxidation

机译：活性炭纤维上负载的铂纳米颗粒作为甲醇氧化的催化剂

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Activated carbon fiber (ACF) with high specific surface area has been used as support in the preparation of Pt nanoparticles electrocatalyst (Pt/ACF) for direct alcohol fuel cells. It is found that the Pt nanoparticles on ACF are highly and homogeneously dispersed with a narrow size distribution in the range of 1.5-3.5 nm with an average size of 2.4 nm. In comparison with the commercial E-TEK Pt/C catalyst, the Pt/ACF catalyst exhibits much higher catalytic activity for methanol, ethanol and isopropanol oxidation, which are about 2.4 times as high as that of the former. The Pt/ACF catalyst is observed to be significantly more stable during the constant current density polarization and continuous cyclic voltammetry in comparison with Pt/C catalyst. Both the uniform dispersion of Pt nanoparticles and strong interactions between Pt nanoparticles and ACF are of benefit to achieve the performance improvement of Pt/ACF catalyst.
机译：具有高比表面积的活性碳纤维（ACF）已被用作制备直接酒精燃料电池的Pt纳米粒子电催化剂（Pt / ACF）的载体。发现ACF上的Pt纳米颗粒高度均匀地分散，在1.5-3.5nm的范围内具有窄的尺寸分布，平均尺寸为2.4nm。与商用E-TEK Pt / C催化剂相比，Pt / ACF催化剂对甲醇，乙醇和异丙醇的氧化具有更高的催化活性，约为前者的2.4倍。与Pt / C催化剂相比，在恒定电流密度极化和连续循环伏安法期间，观察到Pt / ACF催化剂明显更稳定。 Pt纳米粒子的均匀分散以及Pt纳米粒子与ACF之间的强相互作用都有利于实现Pt / ACF催化剂的性能改善。

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