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Analysis of hydrogen distribution on Mg–Ni alloy surface by scanning electron-stimulated desorption ion microscope (SESDIM) |
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| Authors: | Atsushi Yamaga Kiyohide Hibino Masanori Suzuki Masaaki Yamada Kazuhide Tanaka Kazuyuki Ueda |
| Affiliation: | aNano High-Tech Research Center, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511, Japan;bDepartment of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan;cToyota Physical & Chemical Research Institute, Nagakute, Aichi 480-1192, Japan |
| Abstract: | Hydrogen distribution and behavior on a Mg–Ni alloy surface are studied by using a time-of-flight electron-stimulated desorption (TOF-ESD) microscopy and a scanning electron microscope with energy dispersive X-ray spectroscopy (SEM-EDX). The desorbed hydrogen ions are energy-discriminated and distinguished into two characters in the adsorbed states, which belong to Mg2Ni grains and the other to oxygen-contaminated Mg phase at the grain boundaries. Adsorbed hydrogen is found to be stable up to 150 °C, but becomes thermally unstable around at 200 °C. |
| Keywords: | Hydrogen ESD SESDIM Magnesium– nickel alloy Hydrogen storage material |
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