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2017 年度 実績報告書

MOFを基盤としたカーボンアロイ触媒および高性能非白金燃料電池の設計・開発

研究課題

研究課題/領域番号 15F15377
研究機関東京工業大学

研究代表者

山口 猛央  東京工業大学, 科学技術創成研究院, 教授 (30272363)

研究分担者 UNNI SREEKUTTAN  東京工業大学, 科学技術創成研究院, 外国人特別研究員
研究期間 (年度) 2015-11-09 – 2018-03-31
キーワードSolid Alkaline Fuel Cell / Oxygen Reduction / Metal Organic Framework / Electrocatalyst / ZIF
研究実績の概要

Development of cost-effective electrocatalyst for oxygen reduction reaction (ORR) for low-temperature fuel cells (Solid proton/alkaline conducting membrane fuel cells) is one of the major priority research worldwide. In the present case, we have synthesized trimetallic zeolitic imidazole framework (t-ZIF) and used it as a single precursor for the preparation of the precious metal-free catalyst. t-ZIF contain Co, Fe, and Zn as metal centres and 2-methylimidazole as a ligand. During carbonization, t-ZIF produces nitrogen and Fe/Co-Nx doped carbon/ carbon nanotubes alloyed with metal/metal oxide particles encased inside the carbon structures (FeCo-NCZ). Since the electrocatalyst developed from a single precursor, a uniform distribution of active reaction centres (Fe-Nx, Co-Nx, pyridinic/graphitic coordinated nitrogen, etc.) on the surface of the electrocatalyst is obtained. Highly porous nature of the carbon achieved by the leaching-out of Zn at high temperature. The peculiar morphology and reasonably good surface area assist better mass transport and fast electron transport. ORR performance of FeCo-NCZ in alkaline (0.1 M KOH) condition shows the onset potential and half-wave potential of 1.04 V and 0.91 V vs. RHE respectively, which is more positive to commercial Pt/C catalyst. FeCo-NCZ reduces oxygen molecule through direct 4 e- pathways and shows reaction kinetic similar to Pt/C. More importantly, FeCo-NCZ displays high fuel tolerance and electrochemical stability in alkaline condition even at 60 oC. Our study shows FeCo-NCZ is a suitable alternative to Pt/C.

現在までの達成度 (段落)

29年度が最終年度であるため、記入しない。

今後の研究の推進方策

29年度が最終年度であるため、記入しない。

  • 研究成果

    (1件)

すべて 2017

すべて 雑誌論文 (1件) (うち査読あり 1件)

  • [雑誌論文] Direct synthesis of a carbon nanotube interpenetrated doped porous carbon alloy as a durable Pt-free electrocatalyst for the oxygen reduction reaction in an alkaline medium2017

    • 著者名/発表者名
      Sreekuttan M. Unni, Gopinathan M. Anilkumar, Masashi Matsumoto, Takanori Tamaki, Hideto Imai and Takeo Yamaguchi
    • 雑誌名

      Sustainable Energy Fuels

      巻: 1 ページ: 1524-1532

    • DOI

      10.1039/c7se00249a

    • 査読あり

URL: 

公開日: 2018-12-17  

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