Co-Cu バイメタル金属有機フレームキャタリストは,酸素減少のPt/Cベンチマークを上回る
Mohamed Fathi Sanad1,2, Alain R Puente Santiago1, Sarah A Tolba3
1Department of Chemistry and Biochemistry, University of Texas at El Paso, 500 W. University Avenue, El Paso, Texas 79968, United States.
Journal of the American Chemical Society
|March 4, 2021
まとめ
コバルト・コッパー・バイメタリック・メタル・オーガニック・フレームワーク (MOF) を開発しました このMOFは,塩基媒体のプラチナ触媒と比較して,より優れた酸素還元反応 (ORR) の活性と安定性を示しています.
科学分野:
- 材料科学
- 電気化学
- カタリシス
背景:
- プラチナ (Pt) ベースのナノマテリアルは酸素還元反応 (ORR) の主要な触媒である.
- 高いコストと限られた量のPtは,燃料電池と金属空気電池の広範な適用を妨げています.
- 電気化学的エネルギー変換のためのPt触媒の費用対効果の高い代替手段の必要性
研究 の 目的:
- ORRのための非貴金属二金属有機枠 (MOF) 触媒の設計と合成.
- アルカリ環境におけるCo-CuバイメタリックMOFの電気触媒性能と安定性を評価する.
- MOF触媒の性能を商用Pt/C触媒と亜鉛空気電池と比較する.
主な方法:
- Co-CuバイメタリックMOFの低温水熱合成
- 0.1M NaOHにおけるORR活性と安定性のMOF触媒の電気化学的特徴
- 亜鉛空気電池の性能評価について
- 電子構造分析のためのX線光電子スペクトロスコーピー (XPS) と状態の密度プロジェクター (PDOS).
主要な成果:
- Co-CuバイメタリックMOFは,Pt/Cと比較してORRの優れた電解活性を示した.
- RHEに対して1. 06Vのオンセットポテンシャルと,RHEに対して0. 95Vの半波ポテンシャルを達成した.
- 1000回のORRサイクル後に半波電位が30mVしか減少しない電気化学的安定性.
- Pt/Cを上回る電源密度と回転性がある.
結論:
- 合理的に設計されたCo-CuバイメタリックMOFは,ORRにとって非常に有望な非貴重な触媒です.
- MOF構造の Co と Cu センターの間のユニークな電子相乗効果は,強化された触媒性能を駆動します.
- このMOFは,電気化学エネルギー装置のPtベースの触媒に費用対効果の高い効率的な代替手段を提供します.
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