超小高合金作为氨基基燃料电池的多功能催化剂
Yuanyuan Zhang1, Zumin Wang2, Lei Wang1
1College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
Small (Weinheim an der Bergstrasse, Germany)
|July 2, 2024
概括
开发新的催化剂是氨燃料电池的关键. 这项研究引入了一种-铁----的高合金催化剂,可以有效地驱动氨氧化,氧减少和进化反应,为经济高效的燃料电池技术显示出巨大的前景.
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
- 能源转换 能源转换
背景情况:
- 氨燃料电池提供无碳的能量解决方案,但由于反应动力学缓慢而受到阻碍.
- 催化剂是有效的,但昂贵,容易中毒.
- 与其他金属合金金是一种降低成本和提高耐用性的策略.
研究的目的:
- 为燃料电池开发一种具有成本效益的多功能电催化剂.
- 研究一种新型高合金催化剂的性能,用于关键的燃料电池反应.
- 评估催化剂的耐用性和抗毒性质.
主要方法:
- 在碳支上使用朱尔加热合成-铁---高合金 (HEA) 纳米颗粒.
- 氨氧化反应 (AOR),氧减少反应 (ORR) 和演化反应 (HER) 的HEA催化剂的电化学表征.
- 耐久性测试,包括长期稳定性和抗毒性评估.
主要成果:
- 与商业Pt/C.相比,PtFeCoNiIr/C HEA催化剂在AOR,ORR和HER方面表现优异,与商业Pt/C.相比.
- 实现了AOR (139.8Ag-1PGM) 的高峰电流密度,以及优异的ORR (E1/2=0.87V) 和HER (E10=20.3mV) 活动.
- 在200小时以上的HER性能没有损失,表现出显著的稳定性,并在抗中毒测试中保持ORR活性.
结论:
- 开发的PtFeCoNiIr/C HEA催化剂是氨燃料电池的高效和耐用的三功能电催化剂.
- 这项研究为开发多功能电催化剂和成本效益高的燃料电池设计铺平了道路.
- 催化剂显示出在氨动力燃料电池中的实际应用的巨大潜力.
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