PtMo合金とMoO ((x) @Ptコアシェルのナノ粒子は,CO耐性高い電気触媒として使用されています
Zhufang Liu1, Jenny E Hu, Qi Wang
1Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
Journal of the American Chemical Society
|May 21, 2009
まとめ
新しいプラチナ・モリブデン (PtMo) 合金とコアシェルナノ粒子触媒は,一酸化炭素 (CO) 耐性を向上させています. これらの高度な触媒は,陽子交換膜燃料電池での使用が有望であることを示しています.
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
- ナノテクノロジー ナノテクノロジー
背景:
- プロトン交換膜燃料電池 (PEMFC) は,有望なクリーンエネルギー技術です.
- プラチナベースの電気触媒の一酸化炭素 (CO) 中毒は,PEMFCの耐久性と性能にとって重要な課題です.
- CO耐性アノド触媒の開発は,燃料電池技術の進歩に不可欠です.
研究 の 目的:
- 新しいプラチナ-モリブデン (PtMo) 合金とモリブデン酸化物@プラチナ (MoO(x) @Pt) のコアシェルナノ粒子 (NP) を合成し,特徴づけること.
- PEMFCのアノド触媒としてのこれらの新型NPのCO耐性および電解活性を評価する.
- 商用プラチナ・ルテニウム (PtRu) とプラチナ (Pt) 触媒との性能を比較するために.
主な方法:
- PtMo合金NPの合成,化学的コレデクションによる.
- 連続化学的還元によるMoO(x) @PtコアシェルNPの合成.
- PEMFCのアノドアプリケーションの炭素を支える触媒の電気化学的特徴付け.
- 電気化学試験によるCO耐性の評価.
主要な成果:
- 炭素で支えられたPtMo合金とMoO(x) @PtコアシェルのNPを成功裏に合成しました.
- 2つの新しいナノ触媒は,商用E-TEK PtRu合金およびPt触媒と比較して,実質的に高いCO耐性を示しました.
- 強化されたCO耐性は,燃料の流れにあるCOの不純物による中毒に対する耐性の向上を示唆しています.
結論:
- PtMo合金とMoO(x) @PtコアシェルのNPは,CO耐性アノド電触媒の非常に有望な候補である.
- これらの新しいナノ触媒は,陽子交換膜燃料電池の長期的な性能と耐久性を大幅に改善する可能性があります.
- 運用中の燃料電池システムにおけるその応用に関するさらなる研究が必要である.
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