PtTe单层:高基平面活性向氧降低反应的二维电催化剂
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
概括
Telluride (PtTe) 单层显示为氧降解反应 (ORR) 的催化剂. 这种材料具有很好的催化活性和选择性,有可能取代燃料电池中的电极.
科学领域:
- 材料科学
- 催化剂
- 电化学
背景情况:
- telluride (PtTe) 是一个具有金属特性的分层散装材料,即使是单层形式.
- 它的低间层能量促进了化学剥离,用于创建二维材料.
- 在燃料电池中催化氧降解反应 (ORR) 时,以为基础的材料至关重要.
研究的目的:
- 通过计算来研究单层 PtTe 对于氧降解反应 (ORR) 的催化性能.
- 评估单层PtTe作为燃料电池应用中传统电极的潜在替代品.
主要方法:
- 使用第一原理计算来研究PtTe的结构和电子特性.
- 使用计算方法评估单层PtTe对ORR的催化活性和选择性.
主要成果:
- 单层PtTe保持其结构和金属特性.
- 单层PtTe的基底平面对ORR具有很好的催化活性,半波电位约为0.90V.
- 观察到四电子还原通路的高选择性,表明ORR催化效率高.
结论:
- 与传统的电极相比,单层PtTe具有更好的催化性能.
- 它提供了较低的含量,高利用率和较大的表面积.
- 单层PtTe是先进燃料电池组件的一个有前途的候选材料.
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