用于燃料电池应用的有序金属间相的电催化活性
Emerilis Casado-Rivera1, David J Volpe, Laif Alden
1Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA.
Journal of the American Chemical Society
|March 25, 2004
概括
与纯相比,有序的金属间相显示了燃料电池的优越电催化活性. - (PtPb) 在甲醇氧化中显著提高了性能,突出了先进燃料电池催化剂的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 电催化对于高效的燃料电池运行至关重要.
- 纯 (Pt) 是一种常见但有限的电催化剂.
- 开发新型电催化剂对于推进燃料电池技术至关重要.
研究的目的:
- 为了评估有序的金属间相的电催化活动.
- 为了比较它们与纯多晶 (Pt(pc)) 的性能.
- 为了确定燃料电池应用的有希望的电催化剂.
主要方法:
- 系统地研究各种有序的金属间相的电催化活动.
- 使用纯聚晶金电极进行比较分析.
- 对不同燃料的氧化开始潜力和电流密度的评估.
主要成果:
- 许多有序的金属间相表现出比Pt{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\displaystyle Pt}{\text{pc}}{\text{pc}}}}比Pt{\text{pc}}{\text{pc}}}}{\text{pc}}}}{\text{pc}}}}{\text{pc}}}}{\text{pc}}}}{\text{pc}}}{\text{pc}}}{\text{p}}}
- 作为燃料电池电催化剂,PtBi,PtIn和PtPb显示出显著的前景.
- 与Pt.相比,PtPb表现出100mV较少的阳性发作潜力和40倍以上的甲醇氧化峰值电流密度.
结论:
- 顺序的金属间相提供可调节的几何和电子结构,用于优质的电催化.
- 这些材料代表了开发先进燃料电池催化剂的有希望的途径.
- PtPb是甲醇氧化的特别有效的电催化剂,需要进一步研究.
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