水の光酸化のための自己組み立ての有機/金属結合
Astrid J Olaya1, Terumasa Omatsu2, Jonnathan C Hidalgo-Acosta1
1Laboratory of Physical and Analytical Electrochemistry, EPFL Valais Wallis , École Polytechnique Fédérale de Lausanne , CH-1951 Sion , Switzerland.
Journal of the American Chemical Society
|April 11, 2019
まとめ
プラチナの微粒子に TTFとカウンターイオンの自己組み立てが示され p型半導体が生成されます 可視光は効率的な水酸化を引き起こし, O2 と H + を生成し,完全な TTF + を減少させます.
科学分野:
- 材料科学
- 電気化学
- 写真化学
背景:
- 効率的な光触媒の開発は 持続可能なエネルギーに不可欠です
- セルフアセンブリは オーダーされた半導体構造を 合わせた電子特性を生み出すための 経路を提供します
研究 の 目的:
- テトラチアフルワレン (TTF) デリバティブのプラチナ微粒子の現場で自己組み立てを調査する.
- 水酸化のためのこれらの自己組み立ての光触媒活性を探求する.
主な方法:
- 水/アセトニトリル混合物中のプラチナ微粒子のTTF,TTFラジカルカチオン (TTF•+),BF4またはPF6のインシット自己組み立て
- 水の酸化を誘導する可視光光活性化
- 自己組み立て構造の電気化学的特徴
主要な成果:
- プラチナ微粒子のp型半導体セルフアセンブリの形成
- 最初のTTF•+濃度に基づいて,可視光光活性化により,水をO2とH+に100%効率的に酸化する.
- 水によってTTF•+をTTFに完全光還元する.
- Pt微粒子は浮遊微電極として機能し,フェルミレベルはリドックス種 (TTF,TTF•+,HTTF+) によって決定される.
- 溶液中の酸化還元物質の分解は観察されなかった.
結論:
- Pt微粒子の自己組み立てTTFベースのシステムは,効果的な可視光駆動水酸化触媒です.
- このシステムは高い効率と安定性を示し,太陽光燃料の生産の可能性があります.
- Pt微粒子は,電子の移転を媒介し,触媒組成を安定させ,重要な構成要素として作用する.
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