ポリマー電解質燃料電池における酸素還元活性が向上した鉄基触媒
Michel Lefèvre1, Eric Proietti, Frédéric Jaouen
1Institut National de la Recherche Scientifique, Energie, Matériaux et Télécommunication, Varennes, Québec J3X 1S2, Canada.
まとめ
研究者らは燃料電池のための先進的な鉄ベースの触媒を開発し,活性サイトを大幅に増加させました. これらの触媒は,プラチナの性能に匹敵し,クリーンエネルギーアプリケーションの有望な代替案を提供しています.
科学分野:
- 電気化学 電気化学について
- マテリアルサイエンス 材料科学
- カタリシス カタリシス カタリシス
背景:
- 鉄基の触媒は,活性部位密度が低いため,ポリマー電解質膜燃料電池の酸素減少においてプラチナよりも競争力が低い.
- 効率的で費用対効果の高いプラチナの代替品の開発は,燃料電池技術の進歩に不可欠です.
研究 の 目的:
- 酸素還元反応 (ORR) の鉄基触媒の活性部位密度を高めるために.
- ポリマー電解質膜燃料電池 (PEMFC) のプラチナ触媒に匹敵する性能を達成するために.
主な方法:
- 合成された微孔性の炭素を支える鉄基触媒.
- 炭基基を支えるボール磨きフェナントロリンと鉄酸エステットを含む合成経路を使用し,その後に二重酸化 (アルゴン,アンモニア) が続きます.
- グラフィート微孔内のピリジニック窒素によって調整された鉄カチオンに焦点を当てて,触媒構造を特徴づけた.
主要な成果:
- 最適化された合成法により,活性部位の密度が著しく増加した.
- その結果,鉄基の電触媒は,0.4 mg Pt/cm2の負荷でプラチナ基の触媒に匹敵する電流密度を達成した.
- 触媒は0.9V以上の電池電圧で高い性能を示した.
結論:
- 開発された鉄基触媒は,PEMFCにおける酸素還元反応に対して競争力のある性能を示している.
- 合成戦略は,活性部位の密度を効果的に高め,以前の鉄触媒の主要な制限に対処します.
- この進歩は,燃料電池アプリケーションにおけるプラチナの実行可能な,潜在的に低コストの代替案を示しています.
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