Pd纳米线/Pt纳米粒子复合材料的制备及其氧还原催化性能

Fabrication of Pd nanowires /Pt nanoparticles and its activity in oxygen reduction reaction

利用氧化铝模板法结合恒电位法制备了钯纳米线,再结合循环伏安法制备了Pd纳米线/Pt纳米粒子复合材料,用扫描电子显微镜观察了所制备的复合材料的形貌,用能谱仪确认了复合材料的成分,利用循环伏安和线性扫描测试了复合材料的氧还原催化性能。研究结果发现,复合材料表现出优于纯铂和纯钯的催化性能,氧还原峰电流分别比纯铂纳米颗粒和纯钯纳米线的高了8.1倍和2.1倍,氧还原的起峰电位比铂纳米粒子的正移了140m V。

Pd nanowire arrays were prepared by electro-deposition method using anodic aluminum oxide（AAO） template,and Pt nanoparticles were deposited on the Pd nanowire array to prepare Pd nanowires/Pt nanoparticles（Pd NWs/Pt NPs） composite electrode. The morphology of Pd NWs/Pt NPs was observed using scanning electron microscope（SEM）,and the component of Pd NWs/Pt NPs was collected in an energy dispersive spectrometer（EDS）. The electro catalytic activity in oxygen reduction at Pd NWs/Pt NPs composite was measured by cyclic voltammetry（CV） and linear sweep voltammetry（LSV）. The results revealed that Pd NWs/Pt NPs composite exhibits better electro catalytic activity in oxygen reduction than pure Pd NWs or Pt NPs,in which,the peak oxygen reduction current of Pd NWs/Pt NPs is 8.1 times higher than that of pure Pt NPs,and 2.1 times higher than that of pure Pd NWs respectively. Moreover,the reduction potential positively shifts 140 m V in Pd NWs/Pt NPs.