在低温下对甲进行电催化氧化的有机金属复合物
Madhura Joglekar1, Vinh Nguyen2, Svitlana Pylypenko1
1Department of Chemistry and Geochemistry, Colorado School of Mines , Golden, Colorado 80401, United States.
Journal of the American Chemical Society
|October 23, 2015
概括
研究人员开发了低温直接甲燃料电池 (DMEFC) 的催化剂. 这些催化剂显著提高了甲氧化效率,
科学领域:
- 电化学
- 材料科学
- 催化剂
背景情况:
- 直接甲燃料电池 (DMEFC) 提供高效的天然气能量转换.
- 改善甲电氧化是推动DMEFC技术的关键.
- 在实际应用中,低温操作是可取的.
研究的目的:
- 开发用于甲电氧化的新有机金属复合物.
- 将这些复合物固定在有序的半孔碳上 (OMC).
- 在80°C的质子交换膜燃料电池中评估它们的性能.
主要方法:
- 精确定义的有机金属复合物的合成.
- 复合物的共价定在有序半孔碳 (OMC) 上.
- 使用循环电压测量和时电压测量进行电化学表征.
- 通过X射线光电子光谱 (XPS) 进行表面化学分析.
主要成果:
- 达到403μW/mg Pt的最大规范功率密度.
- 催化剂的性能是商业催化剂的5倍,比Pt黑的2倍.
- XPS分析显示了与活性差异相关的不同的催化剂化学成分.
结论:
- 开发的催化剂在DMEFC中表现出优异的甲氧化性能.
- 化学活动关系为C-H键激活电催化剂提供了设计策略.
- 这项工作为高性能DMEFC的商业化提供了可行的途径.
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