空洞的Pt-嵌的RuCu纳米优化OH吸附以实现高效的氧化电催化
Licheng Wei1,2, Yuanting Dong1, Wei Yan1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
我们开发了新的--铜 (Pt-RuCu) 空洞纳米,可显著增强阴离子交换膜燃料电池 (AEMFC) 的氧化反应 (HOR) 动力学. 与现有材料相比,这种催化剂表现出卓越的性能.
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:
- (Ru) 是交换膜燃料电池 (AEMFC) 中氧化反应 (HOR) 的有前途的催化剂.
- 然而,Ru的强氧化亲和力导致性介质中的动力学缓慢.
研究的目的:
- 通过解决Ru的动力限制,为AEMFCs开发高效的HOR催化剂.
- 研究三元Pt-RuCu空心纳米 (NCs) 对HOR性能的协同效应.
主要方法:
- 在RuCu (Pt-RuCu NCs) 上合成三元空洞纳米与Pt表皮质.
- 实验性表征 (例如,光谱,显微镜) 和理论计算.
- 在AEMFC中对催化剂进行电化学测试.
主要成果:
- 优化的Pt8.7-RuCuNCs显示显著增强了HOR活动.
- 催化剂的质量活性达到了5.91 A mgPt+Ru-1,超过了RuCu的NCs/C,PtRu/C和Pt/C.
- 在燃料电池中实现了15.9W mgPt+Ru-1的特定峰值功率密度.
结论:
- Pt-RuCu NC中的协同效应优化了电子结构,平衡了H*/OH*结合,增强了HOR动力学.
- 这些三元纳米代表了AEMFC催化剂开发的重大进步.
- 开发的催化剂为高性能,持久的燃料电池技术提供了一个有希望的途径.
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