梯子型結合ポリマーフォトアノードによる直接光駆動水酸化
Pauline Bornoz1, Mathieu S Prévot1, Xiaoyun Yu1
1Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, École Polytechnique Fédérale de Lausanne (EPFL) , Station 6, 1015 Lausanne, Switzerland.
Journal of the American Chemical Society
|November 19, 2015
まとめ
安定した結合ポリマーであるポリ[ベンジミダゾブンゾフェナントロリン] (BBL) は,太陽光水酸化のフォトアノードとして有望である. ナノ構造のBBLフィルムは,pHと形態によって影響される性能で,重要な光流を達成します.
科学分野:
- 材料科学
- 電気化学
- 光触媒
背景:
- 安定した結合ポリマーは,光電化学の応用のために探求されています.
- 直接的な太陽光による水酸化には,効率的で安定した光電極材料が必要です.
研究 の 目的:
- 直接太陽光による水酸化のためのフォトアノードとして,ポリ[ベンジミダゾブンゾフェナントロリン] (BBL) を評価する.
- 形状とpHがBBL光アノード性能に与える影響を調査する.
主な方法:
- BBLフィルムを分散スプレー方式で製造する
- 太陽光照明をシミュレートした光電気化学測定
- フラットバンドポテンシャル決定のための電気化学阻力スペクトル.
主要な成果:
- ナノ構造のBBLフィルムは1.23VRHEで0.23mAcm−2までの光流を達成しました.
- フラットバンドポテンシャルは,広範囲のpH (+0. 31VNHE) にわたって恒定であった.
- 30分以内にBBL酸化は観察されなかった.
結論:
- BBLは太陽光による水の酸化に安定した材料で,性能はフィルムのナノ構造と電解質のpHに依存する.
- TiO2とNi-Co触媒によるインターフェース機能化は,O2の進化に向けて反応をシフトさせた.
- フォト電流の効率を向上させるには,さらなる最適化が必要である.
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