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Effect Of Surface Oxidation On The Surface Condition And Deuterium Permeability Of A Palladium Membrane

机译：表面氧化对钯膜表面条件和氘渗透性的影响

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摘要

Oxidation and deoxidation of a Pd membrane was conducted in a quartz tube oven in a temperature range of 23-500 °C. The micromorphology and chemical composition of the Pd membrane surface was characterized using scanning electronic microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Micropores and PdO began to form on the Pd membrane surface after oxidation at 240 °C for 1 h and their quantity increased gradually with increasing temperature. A rough Pd membrane surface was obtained when the temperature rose to 500 °C. The PdO on the Pd membrane surface was completely deoxidized once more using H_2 at room temperature, but the rough surface morphology caused by oxidation remained. The deuterium permeability of the Pd membrane was tested using special equipment in the China National Key Laboratory and the results indicated that the rough Pd membrane surface had higher deuterium permeability than the original membrane. The improved deuterium permeability could be attributed to the higher Pd membrane surface area, which provided deuterium atoms with more adsorption sites and dissociation sites.
机译：Pd膜的氧化和脱氧在石英管炉中于23-500°C的温度范围内进行。使用扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对Pd膜表面的微观形貌和化学成分进行表征。在240°C氧化1 h后，Pd膜表面开始形成微孔和PdO，其数量随着温度的升高而逐渐增加。当温度升至500°C时，Pd膜表面粗糙。室温下使用H_2再次使Pd膜表面的PdO完全脱氧，但仍保留了由氧化引起的粗糙表面形态。使用中国国家重点实验室的专用设备对Pd膜的氘渗透性进行了测试，结果表明，粗糙的Pd膜表面的氘渗透性高于原始膜。氘渗透性的提高可归因于较高的Pd膜表面积，这使氘原子具有更多的吸附位和离解位。

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  • 来源
    《Applied Surface Science》 |2011年第23期|p.9852-9857|共6页
  • 作者

    Wei Feng; YingLiu; LixianLian; LixiaPeng; JunLi;

  • 作者单位

    School of Materials Science & Engineering, Sichuan University, Chengdu, 610065, PR China Chengdu University, Chengdu, 610106, PR China;

    School of Materials Science & Engineering, Sichuan University, Chengdu, 610065, PR China;

    School of Materials Science & Engineering, Sichuan University, Chengdu, 610065, PR China;

    National Key Laboratory for Surface Physics and Chemistry, Mianyang, 621907, PR China;

    School of Materials Science & Engineering, Sichuan University, Chengdu, 610065, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Deuterium permeability; Pd membrane; Surface; Oxidation;

    机译：氘渗透性;钯膜;表面;氧化;

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