陽子交換膜水電解用のコバルトトングステートに水酸化物を閉じ込める
Ranit Ram1, Lu Xia1, Hind Benzidi2
1ICFO - Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain.
Science (New York, N.Y.)
|June 20, 2024
まとめ
コバルト・tungstateのデラミネーションは,水の電解における酸素進化反応のための非常に活発で耐久性の高い触媒を生成します. 高価な金属を使わずに 効率的な水素燃料の生産を 進めているのです
科学分野:
- 電気化学
- 材料科学
- カタリシス
背景:
- 酸素進化反応 (OER) は水分解に不可欠ですが,エネルギーが密集しています.
- 通常,陽子交換膜水電解 (PEMWE) で安定したOERに必要なのは貴金属触媒である.
研究 の 目的:
- PEMWEで効率的で耐久的なOERのための非貴金属触媒を開発する.
- 触媒の性能におけるコバルト・ウルフステート・デラミネーションの役割を調査する.
主な方法:
- コバルトtungstateのデラミネーションは,欠陥豊かな構造を作成します.
- PEMWEシステムにおけるデラミネートされた触媒の電気化学試験
- 産業用条件 (80°C) における触媒の安定性と活性性の分析
主要な成果:
- 分層コバルトtungstate触媒は,高い活動性と耐久性を表しています.
- 2Vでより低い超電位と1.8A/cm2の電流密度を達成した.
- 産業用条件下で1.77Vで600時間安定した動作を証明した.
- 従来の触媒と比較して3倍に改善した.
結論:
- コバルト・tungstateのデラミネーションは,グリッドの欠陥で酸化物と水酸化物のネットワークを効果的に安定させます.
- このアプローチは,低コストで高性能な水電解の触媒を開発するための有望な経路を提供します.
- 効率的な水素と太陽光燃料の生産を可能にします
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