光敏感剤で装飾された共電性有機フレームワークに対するCO2の光結合電子還元
Qiu-Jin Wu1,2, Duan-Hui Si1, Shihua Ye1,2
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou 350002, People's Republic of China.
Journal of the American Chemical Society
|August 31, 2023
まとめ
この研究では,光敏感ルテニウム複合体をコバルト-ポルフィリン共性有機フレームワークに統合し,電気触媒による二酸化炭素の減少を促進します. この新材料は可視光下での CO 生成効率を大幅に高めています
科学分野:
- 材料科学
- 電気化学
- 写真化学
背景:
- 電気触媒によるCO2削減 (CO2RR) は,持続可能な化学にとって極めて重要です.
- CO2RR活動を改善するには,しばしば光のような外部からのエネルギー投入が必要です.
- 活発な部位の短い興奮状態の寿命は,光強化の触媒を制限する.
研究 の 目的:
- 光学的に結合された電気触媒による二酸化炭素削減のための新しい材料を開発する.
- 可視光を用いて CO2RR の活性部位の効率と寿命を向上させる.
- CO2RR触媒における光敏感ドナーの役割を調査する.
主な方法:
- Ru ((bpy) 3Cl2 光敏感ドナーをコポルフィリンベースの共性有機フレームワーク (Co-Bpy-COF) に固定する.
- 異なるRu:Co比率 (x = 1/2, 2/3) を有するCo-Bpy-COF-Ru材料の合成
- 可視光と暗闇の条件下でのCO2RRの電気触媒試験
主要な成果:
- 最適なCo-Bpy-COF-Ru1/2は,光の下でのRHEと比較して−0.7Vで96.7%のCOファラダイク効率を達成しました.
- COの部分電流密度は16.27 mA cm-2で, -1.1 VとRHEで記録された.
- 光学的に結合された触媒は,長い興奮状態の寿命と内蔵された電場により,暗闇条件を大幅に上回った.
結論:
- ポルフィリンベースのCOFは,光結合CO2RRに効果的に利用できます.
- Ru ((bpy) 3Cl2ドナーを組み込むと,電子伝送と触媒活性が向上する.
- この研究は,効率的な光結合電触媒の設計のための新しい戦略を確立しています.
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