混合金属のPt単層電触媒で,CO耐性が向上しています
Anand Udaykumar Nilekar1, Kotaro Sasaki, Carrie A Farberow
1Department of Chemical & Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Journal of the American Chemical Society
|October 27, 2011
まとめ
新しいプラチナ金属 (Pt-M) 触媒は,燃料電池のCO中毒を軽減する. これらの高度な材料は,陽子交換膜燃料電池アノドのコストを削減し,効率を改善します.
科学分野:
- 材料科学 材料科学とは
- 電気化学 電気化学について
- コンピューティング・ケミストリー
背景:
- 陽子交換膜燃料電池 (PEMFC) は,クリーンエネルギーにとって極めて重要です.
- プラチナ (Pt) 触媒のCO中毒は,PEMFCアノドの耐久性と効率性にとって大きな課題です.
- Ptの使用を最小限に抑えることは,コスト削減に不可欠です.
研究 の 目的:
- 非Pt金属で支えられた新しいPt-M双金属単層触媒の設計と評価.
- PEMFCアノドのCO中毒に対する触媒の安定性を向上させるため.
- CO酸化の過剰の可能性を軽減し,全体的な材料コストを削減するために.
主な方法:
- 周期的,自己一貫した,密度関数理論 (DFT) 計算.
- CO剥離式電圧測定実験. CO剥離式電圧測定実験.
主要な成果:
- 設計されたPt-Mバイメタリック単層触媒は,Pt以外の金属で支えられています.
- 純粋なPt.と比較して,CO中毒に対する安定性の改善が実証されています.
- DFTは,吸収されたCO分子間の非常に排斥的な相互作用を予測し,結合が弱まり,COの覆い面が低いことを示した.
- 触媒表面からCOの酸化による除去を容易にした.
結論:
- 開発されたPt-M触媒は,PEMFCアノドの安定性と効率を高めています.
- これらの触媒は,高価な純Ptの必要性を減らし,製造コストを削減します.
- この発見は,より経済的で耐久性の高い燃料電池技術への道を開く.
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