【摘要】 采用水热法制备了F掺杂的TiO2,将其与碳黑机械混合制成复合载体,采用微波辅助加热乙二醇法制备了载Pt电催化剂。通过X射线衍射(XRD)和扫描电镜(SEM)对F-TiO2进行了表征,结果表明,F掺杂后,TiO2仍然呈锐钛矿结构,形貌呈纳米片层结构。Pt/F-TiO2-C催化剂表现出很好的催化活性和稳定性,循环伏安法和计时电流法的测试结果表明,复合载体中F的加入有利于甲醇的电催化氧化,提高了Pt对甲醇氧化的抗毒化能力,使其质量比活性是商业Pt/C催化剂的1.2倍。更多还原

【Abstract】 The F-doped Ti O2 prepared by hydrothermal method is mixed with conventional carbon black as a hybrid support and Pt catalysts are prepared through a microwave-assisted polyol process. The F-doped Ti O2 samples are characterized by X-ray diffraction( XRD) and scanning electron microscopy( SEM). The XRD and SEM results reveal that the F-doped Ti O2 samples appear anatase phase and composed of nanoplate structure.The cyclic voltammetry and chronoamperometry results show that the doping of F into hybrid support is beneficial to the electro-catalytic oxidation of methanol and the anti-poisoning ability of platinum for methanol oxidation is enhanced. The mass ratio activity of Pt/F-Ti O2-C catalyst is 1.2 times higher than that of commercial Pt/C catalyst for methanol oxidation.更多还原