一个高效的间插入的Ru阳极催化剂,用于离子交换膜燃料电池
Pengyu Han1, Xinyi Yang1, Liqing Wu1
1College of Chemistry and Molecular Sciences Wuhan University, Wuhan, Hubei, 430072, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 7, 2023
概括
一种新的改性催化剂 (B-Ru/C) 在交换膜燃料电池 (AEMFC) 的性氧化反应 (HOR) 中表现出卓越的性能. 这种催化剂在性条件下表现出卓越的活性,超过了传统的预期,为先进的燃料电池技术铺平了道路.
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:
- 高性能电催化剂对于交换膜燃料电池 (AEMFC) 的商业化至关重要.
- 氧化反应 (HOR) 是AEMFC的一个关键过程,其动力学通常取决于pH值.
研究的目的:
- 开发和评估一种新的-间歇性催化剂 (B-Ru/C) 作为AEMFCs的阳极催化剂.
- 为了研究B-Ru/C催化剂上的HOR动力学异常的pH依赖性行为.
主要方法:
- 在碳支上 (B-Ru/C) 中间插入的合成.
- 在AEMFC中用B-Ru/C作为阳极催化剂进行电化学测试.
- 密度函数理论 (DFT) 计算以了解催化机制.
主要成果:
- 在AEMFC中,B-Ru/C催化剂达到1.37W cm-2的峰值功率密度,相当于商业PtRu催化剂.
- 在依赖pH的HOR动力学中观察到一个意想不到的转折点,在性电解质中具有优越的活性.
- B-Ru/C的质量活性明显高于Ru/C和商业Pt/C,表明提高了性HOR性能.
结论:
- 的间歇性改性增强了电解质中的HOR动力学.
- B-Ru/C催化剂显示出商业化离子交换膜燃料电池的巨大前景.
- 观察到的异常pH依赖性行为归因于Ru的向上移动的d波段中心和优化的吸附/反应能量.
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