陽子交換膜燃料電池のための非常に安定した,CO耐性のあるPt/Ti0.7W0.3O2電触媒
Deli Wang1, Chinmayee V Subban, Hongsen Wang
1Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA.
Journal of the American Chemical Society
|July 29, 2010
まとめ
耐久性があり,安価で効率的なアノド触媒の開発は,陽子交換膜燃料電池 (PEMFC) にとって極めて重要です. Ti{0.7}W{0.3}O{2}のプラチナナノ粒子は,水素酸化に対するユニークな一酸化炭素耐性を示し,PEMFC技術を進歩させています.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- カタリシス カタリシス カタリシス
背景:
- プロトン交換膜燃料電池 (PEMFCs) は,商用化に影響を与える耐久性の課題に直面しています.
- 主な障害は,費用対効果が高く,効率的で,一酸化炭素 (CO) 耐性のあるアノド触媒の必要性です.
- 現在の触媒は,しばしばCO中毒に罹り,燃料電池の性能を低下させる.
研究 の 目的:
- チタン・tungsten酸化物 (Ti{0.7) W{0.3) O{2)) に支えられたプラチナ (Pt) ナノ粒子のCO耐性特性を調査する.
- PEMFCアプリケーションにおける水素酸化のためのPt/Tiの電解活性を評価する.
- Pt/Ti ((0.7) W ((0.3) O ((2) の性能を,商用アノド触媒と比較するために.
主な方法:
- ソル-ジェルプロセスを用いてTi{0.7}W{0.3}O{2}ナノ粒子 (50 nm) の合成.
- Tiのプラチナ化 (0.7) W (0.3) O (2) は,浸透還元技術によって行われます.
- 触媒活性とCO耐性を評価するために,水素酸化と微分電気化学質量スペクトロメトリ (DEMS) を含む電気化学研究.
主要な成果:
- Ti{0.7}W{0.3}O{2}で支えられたPtナノ粒子は,ユニークなCO耐性電解活性を示しています.
- この触媒は,商用PtRu/C触媒と比較して,水素酸化における優れた性能を示しています.
- DEMSの測定は,可逆水素電極 (RHE) に対して0.1V未満のCO酸化開始の可能性を示しています.
結論:
- Pt/Ti{0.7}W{0.3}O{2}は,PEMFCsのための有望な新しいアノド触媒を提示しています.
- 材料のCO耐性は,現在の燃料電池技術における重要な制限に対応しています.
- この開発は,PEMFCの耐久性と商業的生存可能性を大幅に高めることができます.
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