一纳米厚的PtNiRh三金属纳米线在酸性介质中增强氧降解电催化:将多种优势集成到一个催化剂中
Kan Li1, Xingxing Li1, Hongwen Huang1,2
1Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Department of Chemical Physics , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China.
Journal of the American Chemical Society
|November 3, 2018
概括
开发一种新的-- (PtNiRh) 三金属纳米线催化剂显著提高了燃料电池中的酸氧还原反应 (ORR) 的活性和耐久性.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 氧降解反应 (ORR) 对燃料电池的性能至关重要.
- 在酸性ORR催化剂中实现高活性和耐久性是一项挑战.
- 目前的商业催化剂如碳 (Pt/C) 有其局限性.
研究的目的:
- 设计和合成一种活性且耐用的酸氧还原反应 (ORR) 催化剂.
- 研究有助于增强催化性能的结构和组成因素.
- 为开发先进的异质催化剂提供指导.
主要方法:
- 在碳 (PtNiRh/C) 上支持的1纳米厚的-- (PtNiRh) 三金属纳米线的合成.
- 催化剂的质量活性和ORR的特异性活性的电化学特征.
- 在酸性条件下评估催化剂的耐用性.
- 对催化性质的微观结构和组成影响的分析.
主要成果:
- 与商业Pt/C相比,PtNiRh/C催化剂的质量活性高出15.2倍,特异性活性高出9.7倍.
- 增强的活性归因于纳米线的微观结构和组成的压缩应变和配体效应.
- 与商业Pt/C相比,PtNiRh/C催化剂的耐久性显著提高.
- 耐久性的好处来自于一维的纳米线结构和 (Rh) 的结合.
结论:
- 将多种结构和组成优势整合到单一的催化剂中,可以有效地实现高活性和耐用性.
- PtNiRh三金属纳米线代表了酸氧还原反应的有希望的催化剂.
- 这项研究为设计用于能源应用的高级异质催化剂提供了框架.
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