开发基于离子交换电解质和减少含量的催化剂的-氧燃料电池
Oleg Korchagin1, Vera Bogdanovskaya1, Inna Vernigor1
1Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, Russia.
Membranes
|July 28, 2023
概括
研究人员使用一种新的PtMo/CNTN阳极催化剂优化了-氧离子交换膜燃料电池 (AEMFC). 这种催化剂显著提高了氧化反应活性,并达到62mWcm-2的最大功率密度,优于现有的催化剂.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
背景情况:
- 阳离子交换膜燃料电池 (AEMFC) 为传统燃料电池提供了一个有希望的替代品,但通常依赖于昂贵的组金属催化剂.
- 优化催化剂组成和膜电极组件 (MEA) 设计对于提高AEMFC性能和降低成本至关重要.
- 化碳纳米管 (CNTN) 是一种潜在的低成本催化支持材料.
研究的目的:
- 为优化使用Fumatech离子交换膜的-氧AEMFC的MEAs的组成,形成技术和测试条件.
- 为了评估与传统Pt/CNTN催化剂相比,具有减少含量的新型PtMo/CNTN阳极催化剂的性能.
- 研究离子离子体对催化剂活性和MEA性能的影响.
主要方法:
- 阳极催化剂的合成和表征:PtMo/CNTN (10-12 wt.% Pt),Pt/CNTN (10 wt.% Pt) 和Pt/CNTN (60 wt.% Pt) 等.
- 使用Fumatech离子交换膜在模型条件下和燃料电池设置中制造和测试MEAs.
- 对氧化反应 (HOR) 的催化剂活性进行电化学评估,并测量MEA功率密度.
主要成果:
- 与10%和60%的Pt/CNTN催化剂相比,PtMo/CNTN (10-12重量%Pt) 催化剂在质量上显示出明显更高的HOR活性.
- 添加离子离子体对催化剂表面积和HOR活性的影响很小,尽管它引起了一些孔隙阻塞,特别是在60Pt/CNTN催化剂.
- 使用10PtMo/CNTN阳极催化剂的优化MEA实现了62mW cm-2的最大功率密度,超过了类似AEMFC的文献值 (41mW cm-2).
结论:
- 减少负载的PtMo/CNTN催化剂是AEMFCs的高效阳极催化剂,提供更高的活性并使更高的功率密度成为可能.
- 合成的10PtMo/CNTN催化剂即使在离子离子体的存在下也保持高活性,这表明MEA应用的兼容性很好.
- 这项研究通过展示具有成本效益和高性能的催化系统,为AEMFC技术带来了重大进步.
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