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在气体扩散电极半电池中评估成形金属合PtNi电催化剂的氧降解反应活性和稳定性

Shlomi Polani¹, Raffaele Amitrano¹, Adrian Felix Baumunk²

¹Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, Berlin 10623, Germany.

ACS applied materials & interfaces

|September 19, 2024

概括

为质子交换膜燃料电池 (PEMFCs) 开发持久且具有成本效益的基催化剂至关重要. 这项研究使用气体扩散电极设置在现实的条件下评估了催化剂性能,为下一代燃料电池技术提供了洞察力.

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:

质子交换膜燃料电池 (PEMFC) 需要耐用且具有成本效益的阴极催化剂.
基于双金属和三金属的八面体催化剂正在积极开发中.
传统的旋转盘电极方法不足以在工作条件下评估催化剂性能.

研究的目的:

在现实的PEMFC操作条件下评估基催化剂的性能和稳定性.
在稳定性测试后,研究催化剂的行为,包括金属聚合和溶解.
为开发先进的PEMFC催化剂提供指导.

主要方法:

使用气体扩散电极 (GDE) 半电池设置进行催化剂测试.
在相对较高的电流密度下进行了方波稳定性测试.
使用高分辨率扫描电子显微镜 (HR-SEM) 和能量分散式X射线光谱 (EDX) 分析了GDE催化层.

主要成果:

在面向应用的条件下评估了催化剂性能,包括更高的电流密度.
稳定性测试后的分析揭示了对过渡金属聚合和溶解的见解.
与旋转盘电极方法相比,GDE设置提供了更相关的评估.

结论:

气体扩散电极方法适用于在工作条件下评估PEMFC催化剂性能.
了解催化剂降解机制 (聚合,溶解) 是提高耐用性的关键.
这项研究为设计下一代活跃和稳定的PEMFC催化剂提供了有价值的数据.

关键词:

气体扩散电极是一种气体扩散电极.半细胞设置半细胞设置高性能和耐久性的高性能和耐久性.金属兴奋剂的使用方法八面体 PtNi/C 电催化剂质子交换膜燃料电池的燃料电池是什么旋转盘电极是旋转盘的电极.

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