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首页> 外文期刊>Journal of power sources >Gold-nickel/titania nanotubes as electrocatalysts for hydrazine oxidation
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Gold-nickel/titania nanotubes as electrocatalysts for hydrazine oxidation

机译：金镍/二氧化钛纳米管作为肼氧化的电催化剂

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摘要

This work is focused on the study of self-ordered titania nanotube arrayed electrodes for preparation of efficient gold-nickel/titania nanotubes electrocatalysts (denoted as Au(Ni)/TiO_2-NTs) for the oxidation of hydrazine in an alkaline medium. The Au(Ni)/TiO_2-NTs catalysts were prepared by partial galvanic displacement of an electroless Ni layer, deposited on the self-ordered titania, by Au nanoparticles from the gold-containing solution. The morphology, structure and composition of the prepared nano-structured catalysts were examined by Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray Analysis (EDAX), X-ray diffraction (XRD) and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The electrocatalytic activity of the prepared catalysts was investigated towards the oxidation of hydrazine in an alkaline medium by means of cyclic voltammetry and chro-noamperometry. It was found that the prepared Au(Ni)/TiO_2-NTs catalysts with low Au loadings possess more than ten-twenty times higher electrocatalytic activity towards the oxidation of hydrazine in an alkaline medium as compared to that of Au electrodeposited on TiO_2-NTs and Ni/TiO_2-NTs, presumably due to formation of Au nanoparticles of high dispersivity as well as formation of Ni solid solution in gold.
机译：这项工作专注于研究自排序的二氧化钛纳米管阵列电极，以制备用于在碱性介质中氧化肼的高效金-镍/二氧化钛纳米管电催化剂（表示为Au（Ni）/ TiO_2-NTs）。 Au（Ni）/ TiO_2-NTs催化剂是由含金溶液中的Au纳米粒子通过电沉积沉积在自定序二氧化钛上的化学Ni层而部分电沉积制备的。制备的纳米结构催化剂的形貌，结构和组成通过场发射扫描电子显微镜（FESEM），能量色散X射线分析（EDAX），X射线衍射（XRD）和电感耦合等离子体发射光谱法（ ICP-OES）。通过循环伏安法和色散电流法研究了制备的催化剂对肼在碱性介质中氧化的电催化活性。结果发现，所制备的低Au负载量的Au（Ni）/ TiO_2-NTs催化剂与在TiO_2-NTs上电沉积的Au相比，在碱性介质中对肼氧化的电催化活性高十倍以上。 Ni / TiO_2-NTs，可能是由于形成了具有高分散性的Au纳米颗粒以及在金中形成了Ni固溶体。

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  • 来源
    《Journal of power sources》 |2014年第25期|362-370|共9页
  • 作者

    L. Tamasauskaite-Tamasiunaite; J. Rakauskas; A. Balciunaite; A. Zabielaite; J. Vaiciuniene; A. Selskis; R. Juskenas; V. Pakstas; E. Norkus;

  • 作者单位

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

    Center for Physical Sciences and Technology, A. Gostauto 9, Vilnius LT-01108, Lithuania;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Au; Ni; Titania; Nanotube; Hydrazine oxidation;

    机译：Ah;Ni;Chitani;Nanatsube;Hyd Lajine Odachion;

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