CAJ | 학술논문

采用交流电沉积法制备Pd纳米线阵列电极催化剂,循环伏安法测定催化剂对甲醇的电催化氧化活性,用AFM、TEM、XRD和XPS表征Pd纳米线的组织形貌、晶体结构和化学状态.结果表明:Pd纳米线的直径为65~75 nm,径向表面呈毛刺结构,处于体心立方晶体结构的单质态.Pd纳米线阵列电极在KOH碱性介质中对甲醇的电催化氧化活性比其平板电极高约14倍,比文献中负载型Pt纳米颗粒催化剂在酸性介质中的催化活性高50~150倍,且具有较好的稳定性.
채용교류전침적법제비Pd납미선진렬전겁최화제,순배복안법측정최화제대갑순적전최화양화활성,용AFM、TEM、XRD화XPS표정Pd납미선적조직형모、정체결구화화학상태.결과표명:Pd납미선적직경위65~75 nm,경향표면정모자결구,처우체심립방정체결구적단질태.Pd납미선진렬전겁재KOH감성개질중대갑순적전최화양화활성비기평판전겁고약14배,비문헌중부재형Pt납미과립최화제재산성개질중적최화활성고50~150배,차구유교호적은정성.
Palladium nanowire array electrode catalysts were prepared by AC electro-deposition method. The electro-catalytic oxidation activities for methanol were measured by cyclic voltammetry. The morphology, crystal structure and chemical state of Pd nanowires were characterized by AFM, TEM, XRD and XPS. The results indicate that the diameter of Pd nanowires was about from 65 to 75 nm, their radial surface was not smooth but coarse, and they were simple substance with body centered cubic structure. The electro-catalytic activity of Pd nanowire array electrode for methanol in KOH was about 14 times higher than that of Pd plane electrode and 50-150 times higher than that of carbon supported Pt nanoparticles catalysts in acid media in the reported researches. Moreover, the stability of this electrode was good.