【摘要】 借助阳极氧化铝模板,通过交流电沉积的方法制备了Pt纳米线。通过透射电镜(TEM)、X射线衍射(XRD)仪和X射线光电子能谱(XPS)等检测手段分别对Pt纳米线的组织形貌、晶体结构和化学状态等进行了表征。通过循环伏安法(CV)和时间电流法(i-t)对Pt纳米线在KOH碱性介质中的电催化氧化性能进行了表征。结果表明:Pt纳米线的直径约为65~75nm,纳米线径向呈毛刺结构,属于多晶态结构。Pt纳米线电极在碱性介质中对甲醇具有高的电催化氧化活性,约为商业Pt/C(JM公司)催化剂的1.38倍。此外,对Pt纳米线的催化机理进行了简要分析。更多还原

【Abstract】 Pt nanowires were prepared by the alternating current deposition method using porous anodic alumina as templates. The organization morphology, crystal structure and chemical state of Pt nanowires were characterized by transmission electron microscope(TEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS), respectively. The electrocatalytic performance of Pt nanowires was further analyzed by cyclic voltammetry(CV) and timing current(i-t) methods in potassium hydroxide solution. The results show that the diameter of Pt nanowires is about 65~75 nm, and radial surfaces of nanowires present burr state. Pt nanowires are polycrystalline structure and simple substance. Pt nanowires electrode has higher electrocatalytic oxidation activity for methanol in alkaline medium than in acid medium and is 1.38 times higher than the standard Pt/C catalyst(JM company). Moreover, the catalytic mechanism was briefly analyzed.更多还原