成果報告書詳細
管理番号20150000000327
タイトル*平成26年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素ステーション用低コスト機器・システム等に関する研究開発 燃料電池自動車用水素貯蔵材料に関する研究開発 吸着系水素貯蔵材料の研究開 (東北大学)
公開日2015/12/22
報告書年度2014 - 2014
委託先名国立大学法人東北大学
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title : Development of hydrogen storage materials based on reversible adsorption (FY2013-FY2015) FY2014 Annual Report

1) Hydrogen storage in transition metal-doped carbons
Considering practical use of hydrogen storage materials, it is difficult to use Pt-loaded carbons due to the high price of Pt. Thus, it is highly required to develop hydrogen-storage materials by using much cheaper metals. We have thus prepared Fe or Ni doped high-porous carbons and showed their potential as hydrogen storage materials last year. In this year, we have further investigated the structure properties of the resulting materials and their hydrogen storage properties. By the analysis of high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), it was revealed that Ni-doped zeolite templated carbon (Ni/ZTC) prepared by using nickelocene as a metal source contains very small sized Ni nanoclusters, whose size is less than 2 nm and invisible with the conventional transmission electron microscopy. Thus, the small Ni cluster is ascribed to be related to the high activity of Ni/ZTC towards hydrogen spillover. To examine the effect of the sample preparation method, we have prepared another counterpart Ni-doped ZTC by using nickelocene as a metal source, but it is introduced into ZTC with liquid-phase adsorption in toluene. Interestingly, the counterpart Ni-doped ZTC thus prepared shows quite small amount of hydrogen spillover effect. Thus, the preparation condition is of significance in obtaining a good hydrogen storage material based on Ni. On the other hand, Fe-doped ZTC shows little hydrogen spillover activity.

2) High-pressure hydrogen storage
Previously, we have shown that Pt-cluster (the size is less than 2 nm) is very active to hydrogen spillover. In this year, we have prepared Pt-cluster loaded ketchen black (Pt/KB) and its hydrogen storage at 25/50 °C was examined up to 10 MPa. However, the Pt/KB thus prepared did not show significant spillover activity even at a low pressure region. There seems to be a problem in material synthesis process, and this needs to be improved next year.

3) Development of chap storage materials
Considering practical use of hydrogen storage materials, it is difficult to use expensive materials, such as Pt and ZTC. Thus, it is highly required to develop hydrogen-storage materials by using much cheaper materials. We have previously shown an interesting possibility of C60 as an acceptor of spillover hydrogen. In this year, we tried to develop C60-based porous materials with a reasonably inexpensive method. We have succeeded in preparing a porous material having the surface area of 552 m2/g.
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