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首页> 外文期刊>RSC Advances >Hydrogen absorption and desorption on Rh nanoparticles revealed byin situdispersive X-ray absorption fine structure spectroscopy
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Hydrogen absorption and desorption on Rh nanoparticles revealed byin situdispersive X-ray absorption fine structure spectroscopy

机译：通过原位色散X射线吸收细结构光谱显示Rh纳米粒子的氢吸收和解吸

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摘要

To unveil the origin of the hydrogen-storage properties of rhodium nanoparticles (Rh NPs), we investigated the dynamical structural change of Rh NPs usingin situdispersive X-ray absorption fine structure spectroscopy (XAFS). The variation of the Rh-Rh interatomic distance and Debye-Waller factor of Rh NPs with a size of 4.0 and 10.5 nm during hydrogen absorption and desorption suggested that they have a different mechanism for hydrogen absorption, which is that the hydrogen absorption on the inner site has a greater contribution than that on a surface for Rh 4.0 nm. In the case of Rh 10.5 nm, it is opposed to Rh 4.0 nm. This study demonstrates a powerfulin situXAFS method for observing small local structural changes of metal nanoparticles and its importance for understanding of the hydrogen-absorption properties of Rh NPs with an interesting hydrogenation mechanism.
机译：为了揭示铑纳米粒子（RH NPS）的氢储土性质的来源，我们研究了使用Satudispersive X射线吸收细结构光谱（XAF）的Rh NP的动态结构变化。 Rh-rh内部距离和rh NPS的次曲线距离的变化率为4.0和10.5nm在氢吸收和解吸期间表明它们具有不同的氢吸收机制，这是内部的氢吸收 网站在RH 4.0 NM的表面上具有更大的贡献。 在RH 10.5nm的情况下，它与RH 4.0nm相反。 该研究表明，一种强大的SitaxAFS方法，用于观察金属纳米粒子的小局部结构变化及其具有有趣的氢化机制的rh NP的氢吸收性能的重要性。

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  • 来源
    《RSC Advances》 |2020年第34期|共8页
  • 作者

    Song Chulho; Seo Okkyun; Matsumura Daiju; Hiroi Satoshi; Cui Yi-Tao; Kim Jaemyung; Chen Yanna; Tayal Akhil; Kusada Kohei; Kobayashi Hirokazu; Kitagawa Hiroshi; Sakata Osami;

  • 作者单位

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

    Japan Atom Energy Agcy Quantum Beam Sci Ctr 1-1-1 Koto Sayo Hyogo 6795165 Japan;

    Natl Inst Mat Sci Synchrotron Xray Grp Res Ctr Adv Measurement &

    Characterizat 1-1-1 Kouto Sayo Hyogo 6795148 Japan;

    Univ Tokyo Inst Solid State Phys Synchrotron Radiat Lab 1-490-2 Kouto Shingu Cho Tatsuno Hyogo 6795165 Japan;

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

    Kyoto Univ Grad Sch Sci Div Chem Sakyo Ku Kitashirakawa Oiwake Cho Kyoto 6068502 Japan;

    Kyoto Univ Grad Sch Sci Div Chem Sakyo Ku Kitashirakawa Oiwake Cho Kyoto 6068502 Japan;

    Kyoto Univ Grad Sch Sci Div Chem Sakyo Ku Kitashirakawa Oiwake Cho Kyoto 6068502 Japan;

    Natl Inst Mat Sci Synchrotron Xray Stn SPring 8 Res Network &

    Facil Serv Div 1-1-1 Kouta Sayo Hyogo 6795148 Japan;

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  • 正文语种 eng
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