PtTe単層:酸素還元反応に向けて高い基礎平面活性を持つ二次元電気触媒
Yu Wang1, Yafei Li1, Thomas Heine2,3
1Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science , Nanjing Normal University , Nanjing 210023 , China.
Journal of the American Chemical Society
|October 2, 2018
まとめ
プラチナテルリド (PtTe) モノレイヤは酸素還元反応 (ORR) の触媒として有望である. この材料は優れた触媒活性と選択性を有しており,燃料電池のプラチナ電極を代替する可能性があります.
科学分野:
- 材料科学
- カタリシス
- 電気化学
背景:
- プレタニウムテルリド (PtTe) は,単層の形態であっても金属の性質を持つ層状の散発材料です.
- 2D素材を作るための化学的剥離を容易にする.
- プラチナ基の材料は燃料電池における酸素還元反応 (ORR) の触媒に不可欠です.
研究 の 目的:
- 酸素還元反応 (ORR) のための単層PtTeの触媒性能を計算的に調査する.
- 燃料電池での従来のプラチナ電極の潜在的な代替品として単層PtTeを評価する.
主な方法:
- PtTeの構造的および電子的性質を研究するために,第一原理の計算を使用した.
- 単層PtTeのORRに対する触媒活性と選択性を評価するために,計算方法を使用した.
主要な成果:
- モノレイヤPtTeは構造と金属特性を維持しています.
- 単層PtTeの基礎平面は,約0. 90Vの半波電位を持つORRのための優れた触媒活性を示しています.
- 4電子還元経路の高い選択性が観察され,効率的なORR触媒を示した.
結論:
- モノレイヤPtTeは,従来のプラチナ電極と比較して優れた触媒性能を示しています.
- プラチナの含有量が少なく,プラチナの利用量が高く,表面積も大きい.
- モノレイヤPtTeは先進的な燃料電池コンポーネントのための有望な候補材料です.
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