表面に設置された金属有機フレームワークから派生した電気触媒の前例のない高酸素進化活動
Weijin Li1, Sebastian Watzele2,3, Hany A El-Sayed4
1Chair of Inorganic and Metal-organic Chemistry, Catalysis Research Center, Ernst-Otto-Fischer Straße 1 and Department of Chemistry , Technical University of Munich , Lichtenbergstraße 4 , 85748 Garching b. München , Germany.
Journal of the American Chemical Society
|March 20, 2019
まとめ
再生可能エネルギーの貯蔵には 先進的な電気触媒の開発が不可欠です この研究は,SURMOFの薄膜から派生した新しい混合ニッケル/コバルト水酸化物電解剤を提示し,優れた酸素進化反応活性と安定性を示しています.
科学分野:
- 電気化学
- 材料科学
- 再生可能エネルギー
背景:
- 酸素進化反応 (OER) はエネルギー貯蔵システムにとって不可欠です.
- 効率的で耐久性があり,スケーラブルな非貴金属OER電触媒の開発は大きな課題です.
研究 の 目的:
- OERのための新しい混合ニッケル/コバルト水酸化物の電気触媒を合成し評価する.
- OER電触媒の先駆体としての表面マウントメタル有機フレーム (SURMOF) の薄膜の可能性を調査する.
主な方法:
- 混合ニッケル/コバルト水酸化物の電気触媒を,電極基板上で層ごとに成長したSURMOF薄膜から1段階派生する.
- OERの活性とアルカリ溶液における安定性の電気化学的特徴
- 触媒形態と活性部位の暴露の分析
主要な成果:
- 導出された混合ニッケル/コバルト水酸化物電解剤は,高OER活性とアルカリ環境での安定性を示す.
- 300 mVの超電位で ~2.5 mA·μg−1の質量活動を達成し,基準のIrO2と最先端の触媒を大幅に上回る.
- SURMOFsから派生した超薄の電触媒コーティングは,活性NiとCoサイトの露出を高めます.
結論:
- SURMOFから派生した混合ニッケル/コバルト水酸化物は,酸素進化反応のための非常に有望な非貴金属電気触媒のクラスです.
- 容易な合成と優れた性能は,高度なエネルギー貯蔵アプリケーションのためのスケーラブルな経路を提供します.
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