Catalytic effect of 3d transition metals on hydrogen storage properties in mechanically milled graphite |
| |
| Institution: | 1. Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi, Hiroshima 739-8530, Japan;2. Natural Science Center for Basic Research and Development, Hiroshima University, Higashi, Hiroshima 739-8530, Japan;3. BMW Technology and Research, EV-26, Munich 80788, Germany;1. Department of Material Science and Engineering, College of Materials, South China Agricultural University, 510642 Guangzhou, China;2. Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden;3. School of Materials Science and Engineering, South China University of Technology, 510641 Guangzhou, China;4. College of Physical Science and Technology, Guangxi University, Nanning 530004, China;5. Institute for Renewable Energy, EURAC Research, Viale Druso 1, I-39100 Bolzano, Italy;1. School of New Energy, Bohai University, Jinzhou 121013, China;2. School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China;1. L.M.C.N, Université de Monastir, Avenue de l’Environnement, 5019, Monastir, Tunisia;2. L.C.H.P.N.R, Université de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia;3. UMR 8180, Université de Versailles, 45, Avenue des Etats-Unis, 78035 Versailles, France;1. Department of Chemistry, Faculty of Sciences, University of Zanjan, 45195-313 Zanjan, Iran;2. Faculty of Chemistry, University of Wroclaw, Joliot-Curie 14, Wroclaw 50-383, Poland |
| |
| Abstract: | In this paper, we examined the catalytic effect of 3d transition metals on hydrogen storage properties in nanostructural graphite prepared by ball milling under hydrogen atmosphere. The Fe-doped nanostructured graphite shows the most marked hydrogen storage properties among the Fe-, Co-, Ni- and Cu-catalyzed graphite systems. The absorbed hydrogen concentration reaches up to ∼4 wt% by mechanically milling for 32 h (∼7 wt% for 80 h), and two peaks of hydrogen (mass number=2) around 730 and 1050 K were observed in the thermal desorption mass spectra (TDS). The starting temperature for hydrogen desorption was ∼600 K. On the other hand, the Co-doped graphite indicates that absorbed hydrogen concentrations reaches up to ∼2 wt% by mechanically milling for 32 h. The TDS spectrum showed only a broad peak around 1100 K, but the starting point for hydrogen desorption lowered down to ∼500 K. The Ni- and Cu-doped graphites did not show any significant improvement for hydrogen storage. These results suggest that the catalytic effect on hydrogen storage properties strongly depends on the affinity of graphite and doped metals. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
