碳纤维基PtPb阳极催化剂的制备及其电催化性能

以静电纺丝技术与烧结工艺相结合的方式制备了碳纤维基PtPb纳米催化剂，并采用X射线衍射（XRD）、红外光谱（FT-IR）、扫描电镜（SEM）等分析测试手段对其进行了表征。结果表明，在预氧化温度为300 ℃、碳化温度为800 ℃的条件下，所制备的PtPb阳极纳米催化剂结晶程度好、比表面积大，粒径约为3.05 nm，催化活性颗粒均匀分散在多孔碳纤维骨架上。采用循环伏安法（CV）及交流阻抗（EIS）评价了该催化剂对乙醇氧化反应的电催化性能。结果表明，最大峰电流密度达到125 mA/cm²，电荷转移电阻相较于700 ℃下降了近60%。

Preparation and electrocatalytic performance of PtPb anode catalyst supported on carbon fiber

Nano PtPb anode catalyst supported on carbon fiber was prepared by the technology of electro-spinning combined with sintering; the catalyst was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and scanning electron microscopy (SEM). The results showed that the nano catalyst is well dispersed on the skeleton of vesicular carbon fiber with a particle size of 3.05 nm; the catalytic efficiency is significantly improved by pre-oxidation at 300 ℃and carbonization at 800 ℃. The catalyst activity in ethanol oxidation was evaluated through cyclic voltammogram (CV) and electrochemical impedance spectroscopy (EIS). The results indicated that the catalyst has better resistance against poisoning; over it, the maximum current density is 125 mA/cm² and the charge transfer resistance is reduced by 60% in comparison with that over the catalyst carbonized at 700 ℃.