酸素進化反応のためのコバルト-鉄の二重原子触媒
Lichen Bai1, Chia-Shuo Hsu2, Duncan T L Alexander3,4
1Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL), EPFL-ISIC-LSCI , BCH 3305 , CH 1015 Lausanne , Switzerland.
Journal of the American Chemical Society
|August 17, 2019
まとめ
単原子触媒は,酸素進化反応 (OER) のための高効率の二原子触媒に変換することができます. この新しい Co-Fe 触媒は優れた性能を示し,二重原子触媒の可能性を実証しています.
科学分野:
- 材料科学
- キャタリシス
- 電気化学
背景:
- 単原子触媒は高原子効率を提供するが,アルカリ酸素進化反応 (OER) のような二金属促進を必要とする反応では限られている.
- 酸素進化反応 (OER) はエネルギー変換に不可欠ですが,非常に効率的で安定した触媒が必要です.
研究 の 目的:
- 単原子の触媒を二原子の触媒に変換することによって,酸素進化反応 (OER) の高度に活性で安定した触媒を開発する.
- 新しい二原子触媒の活性部位構造と触媒機構を調査する.
主な方法:
- 単原子コバルト (Co) の前触媒をコバルト鉄 (Co-Fe) の二原子触媒に現場で変換する.
- 催化剤とその性能を特徴付けるために,X線吸収スペクトロスコーピー (XAS),顕微鏡,スペクトロスコーピーを含む電気化学的測定.
主要な成果:
- 現場で変換された二原子のC-Fe触媒は,金属酸化物の中でOERの最高回転率を示した.
- オペランドXASおよび他の特徴付け技術は,強化された触媒活性に責任のある活性部位として二重のCo-Fe分子を特定しました.
結論:
- 二重原子触媒は,酸素進化反応 (OER) の高度に効率的で明確に定義された触媒を設計するための有望な戦略です.
- 開発されたCo-Fe二原子触媒は,OER触媒の重要な進歩であり,エネルギー変換技術の新しい道を提供します.
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