燃料電池アプリケーションのオーダーメタル間の相の電解活性
Emerilis Casado-Rivera1, David J Volpe, Laif Alden
1Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA.
Journal of the American Chemical Society
|March 25, 2004
まとめ
オーダーされた金属間相は,純粋なプラチナと比較して燃料電池の優れた電気触媒活性を示しています. プラチナ鉛 (PtPb) は,メタノール酸化における性能を大幅に向上させ,先進的な燃料電池触媒の可能性を強調しました.
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
- カタリシス カタリシス カタリシス
背景:
- 電気触媒は燃料電池の効率的な動作に不可欠です.
- 純プラチナ (Pt) は一般的な,しかし限られた電気触媒です.
- 燃料電池技術の進歩のために,新しい電気触媒の開発は不可欠です.
研究 の 目的:
- オーダーされた金属間相の電気触媒活動を評価する.
- 純粋なポリクリスタリンプラチナ (Pt(pc)) との性能を比較するために.
- 燃料電池アプリケーションのための有望な電気触媒を特定する.
主な方法:
- 様々な秩序付けられた金属間相の電解活性に関する体系的な研究.
- 純ポリクリスタリンプラチナ電極による比較分析.
- 異なる燃料の酸化開始の可能性と電流密度の評価.
主要な成果:
- 多くのオーダーメタル間の相は,Pt (((pc)) よりも電解活性が強化されたことを示した.
- PtBi,PtIn,およびPtPbは,燃料電池の電気触媒として有望であることを示しました.
- PtPbは,Pt.に比べて100mVのポジティブ開始ポテンシャルが少なく,メタノール酸化のピーク電流密度はPt.と比較して約40倍高かった.
結論:
- オーダーされたインターメタリックフェーズは,優れた電気触媒処理のための調節可能な幾何学および電子構造を提供します.
- これらの材料は,先進的な燃料電池触媒の開発に有望な道を示しています.
- PtPbは,メタノールの酸化に特に効果的な電気触媒であり,さらなる調査が必要である.
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