無害なボラートバッファの二銅ペプトイドは,低過剰電位で均質な水の酸化のための高速電気触媒である
Guilin Ruan1, Pritam Ghosh1, Natalia Fridman1
1Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.
Journal of the American Chemical Society
|July 9, 2021
まとめ
新しい銅ペプトイド触媒Cu2 (BEE) 2は,再生可能燃料のための水の酸化を効率的に触媒化します. この触媒は最高レベルの活性と安定性を示し 水の電解における主要な限界を克服しています
科学分野:
- 電気化学
- カタリシス
- 再生可能エネルギー
背景:
- 再生可能燃料にとって 水の電解は極めて重要ですが,高超電位と遅い運動によって制限されます.
- 二核銅センターとボラートバッファは,水酸化触媒を強化することが知られている.
- ペプトイドは,N置換されたグリシンオリゴーマーで,高酸化状態の金属イオンを安定させ,自己組織化複合体を形成することができます.
研究 の 目的:
- 水酸化のための高活性で安定した均質の電解剤を開発する.
- 銅触媒による水の酸化におけるペプトイド結合体とバッファシステムの役割を調査する.
- 効率的な水電触媒のための独特の銅ペプトイド複合体,Cu2 (BEE) 2について報告する.
主な方法:
- ビピリジンとエタノール基を持つペプトイドトリマー (BEE) を使用して,銅ペプトイド複合体Cu2 ((BEE)) 2の合成.
- Cu2 ((BEE)) 2の特徴は,単結晶X線 difraktion,スペクトルスコピー,および電気化学を用いた.
- 制御された潜在電解サイクルを含むpH9.35のボラートバッファでの電気触媒試験
主要な成果:
- Cu2 ((BEE) 2は,高触媒活性を示し,回転頻度は129s−1 (ピーク電流) と5503s−1 (FOWA) であった.
- 触媒は4回の電解サイクルで優れた安定性を示し,2時間で51.4の回転率を達成した.
- 単一のエタノールサイドチェーンを持つ対照複合体は,有意に低い活性を示した (大きさの2度未満).
結論:
- Cu2 (BEE) 2は水酸化のための高効率で安定した均質の電解剤です.
- ペプトイド結合体とボラートバッファーのエタノール側鎖は,触媒の活性と安定性を高める上で重要な役割を果たします.
- この発見は水分解による 再生可能燃料の生産における 先進的な触媒への道を開きます
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