コア/シェル Pd/FePtナノ粒子は,酸素還元反応の活性で耐久的な触媒として使用されます
Vismadeb Mazumder1, Miaofang Chi, Karren L More
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA.
Journal of the American Chemical Society
|May 26, 2010
まとめ
私たちは,酸素還元反応のために,コア/シェルパラジウム/鉄・プラチナ・ナノ粒子を合成しました. 薄い1nmの鉄・プラチナ・シェルは,燃料電池の触媒の耐久性と活性性を大幅に高めます.
科学分野:
- マテリアルサイエンス 材料科学
- ナノテクノロジー ナノテクノロジー
- 電気化学 電気化学について
背景:
- 効率的な触媒の開発は,燃料電池技術の進歩に不可欠です.
- パラジウム (Pd) およびプラチナ (Pt) ベースのナノマテリアルは,燃料電池触媒の重要な構成要素です.
- コア/シェルのナノ粒子構造を理解することで,触媒性能を最適化することができます.
研究 の 目的:
- コア/シェルパラジウム/鉄・プラチナ (Pd/FePt) のナノ粒子を合成するために.
- 酸素還元反応 (ORR) のためのこれらのナノ粒子の触媒活性と耐久性を調査する.
- FePt殻の厚さの触媒特性への影響を決定する.
主な方法:
- 鉄ペンタカルボニル [Fe (((CO)) 5の制御された核化は,プラチナ塩の存在下でパラジウムナノ粒子に.
- 均一なFePt殻形成を達成するために,特定の反応温度で行われる合成.
- 酸素還元反応 (ORR) の活性と耐久性を評価するための電気化学試験.
主要な成果:
- 均一なFePt殻を持つコア/シェル Pd/FePtナノ粒子を成功して合成しました.
- 触媒的性質はFePt殻の厚さに依存していた.
- 1nmのFePtシェルを持つPd/FePtNPは,3nmのシェルを持つものと比較して,15倍の活性と140mVの発生ポテンシャル増加を示した.
- 強化された耐久性は,最適化されたFePtシェルで観察されました.
結論:
- コア/シェル Pd/FePtナノ粒子は,燃料電池触媒の改良のための有望な経路を提供します.
- FePt殻の厚さを最適化することは,触媒効率と長寿を最大限にするために重要です.
- これらの新しいナノ粒子は,実用的な燃料電池アプリケーションの可能性を秘めています.
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