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首页> 外文期刊>Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry >Electrochemical and X-ray absorption spectroscopy studies of copper coatings on a hydrogen storage alloy
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Electrochemical and X-ray absorption spectroscopy studies of copper coatings on a hydrogen storage alloy

机译：储氢合金上铜涂层的电化学和X射线吸收光谱研究

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Electroless copper deposits were made on the surface of LaN47Sn0.3 particles with the aim of studying the influence on the charge/discharge performance of this metal hydride alloy. Cu layers were produced using formaldehyde and hydrogen as reducing agents and the near-range order and composition investigated as a function of deposition method by X-ray absorption spectroscopy. The electroless layer deposited using formaldehyde was shown to be mainly in the metallic state (Cu-0). The copper layer prepared using hydrogen resulted in a mixed phase formed by metallic and oxidized copper species. Results also indicated that the copper layer protects the Ni atoms against corrosion, but this does not help in capacity retention during the charge/discharge cycling of the alloy. The electrode coated with the hydrogen reduced copper layer had lower discharge overpotentials relative to the uncoated electrode, implying an increase in the exchange current density for the process. (C) 2004 Elsevier B.V. All rights reserved.
机译：为了研究对这种金属氢化物合金的充电/放电性能的影响，在LaN47Sn0.3颗粒的表面上进行了化学镀铜沉积。使用甲醛和氢作为还原剂生产铜层，并通过X射线吸收光谱研究近距离有序和组成与沉积方法的关系。显示使用甲醛沉积的化学镀层主要处于金属态（Cu-0）。使用氢制备的铜层导致由金属和氧化的铜物质形成的混合相。结果还表明，铜层可保护Ni原子免受腐蚀，但这在合金的充电/放电循环过程中无助于保持容量。相对于未涂覆的电极，涂覆有氢还原的铜层的电极具有较低的放电过电势，这意味着该过程的交换电流密度增加。 （C）2004 Elsevier B.V.保留所有权利。

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