Nanoparticulate Pt-catalyzed hydrogenation of Yb films: Towards hydrides with higher hydrogen compositions

被引：1

作者：

Yoshizumi, Toshihiro ^{[1
]}

Koshiba, Keigo ^{[1
]}

Kitsunai, Satoru ^{[1
]}

Yoshizawa, Teru ^{[1
]}

Nakamura, Osamu ^{[2
]}

Sakai, Masamichi ^{[1
]}

机构：

[1] Saitama Univ, Grad Sch Sci & Engn, Div Mat Sci, Saitama 3388570, Japan

[2] Okayama Univ Sci, Res Support Ctr, Okayama 7000005, Japan

来源：

CHEMICAL PHYSICS | 2021年 / 544卷

关键词：

Yb hydride film; Nanoparticulate catalyst capping; Ambient-pressure hydrogenation;

D O I：

10.1016/j.chemphys.2021.111121

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It is more difficult to synthesize beta-phase ytterbium trihydride (beta-YbH3-delta) under moderate conditions than other rare-earth metal trihydrides because it requires a valence change from a fully occupied 4f shell (4f(14)) in Yb2+ to an unclosed shell (4f(13)) in Yb3+. We synthesized beta-YbH3-delta at ambient pressure through hydrogenation of a Yb film capped with platinum (Pt) nanoparticle (NP) catalysts. In addition, Pt NP capping enabled us to synthesize alpha-phase Yb dihydride (alpha-YbH2 +/-delta) at room temperature. The difficulty of trihydrogenating Yb to beta-YbH3-delta is explained by kinetic analyses based on temperature and time dependences of molar fractions of alpha-YbH2 +/-delta and beta-YbH3-delta. Pt NP capping can be used to synthesize other hydrogen-rich rare-earth metal hydrides under ambient pressure and lower temperatures.

引用

页数：5

共 35 条

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[35] Towards superconductivity in hydrides: computational studies of two hypothetical ternary compounds, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{Yb}}^{{{\text{II}}}} {\text{BeH}}_{4} $$\end{document}and\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{Cs}}_{3} {\text{Yb}}^{{{\text{III}}}} {\text{H}}_{6} $$\end{document}
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Journal of Molecular Modeling, 2007, 13 (6-7) : 769 - 774

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