温度对碳和ATO支持的氧进化反应催化剂在气体扩散电极设置中的性能的影响
Aline Bornet1, Rebecca Pittkowski2, Tobias M Nielsen2
1Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland.
这项研究研究了 (Ir) 和- (IrRu) 纳米粒子用于氧化演化反应 (OER) 催化. 令人惊的是,添加氧化锡 (ATO) 支持在高温下降解,阻碍了OER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:
- 基于 (Ir) 的电催化剂是酸性介质中氧化演化反应 (OER) 的最新技术.
- 在工业应用中,有效利用稀缺的Ir至关重要.
- 氧化 (ATO) 已被提出为OER催化剂的有希望的支持.
研究的目的:
- 在碳和ATO支上固定超小的Ir和Ir0.4Ru0.6纳米粒子以最大限度地扩散.
- 用气体扩散电极 (GDE) 装置在酸性条件下评估这些催化剂的性能.
- 评估ATO支持的稳定性和温度依赖的行为.
主要方法:
- 在高表面积碳和ATO支上固定Ir0.4Ru0.6和Ir0.4Ru0.6纳米粒子.
- 在酸性条件下测量氧演化反应 (OER) 的电催化活性.
- 使用气体扩散电极 (GDE) 设置的温度依赖性性能评估.
主要成果:
- 在商业ATO上固定的催化剂与碳支器上的催化剂相比,OER性能较低.
- ATO支持显示显著恶化,特别是在高温下.
- 在两种支上都实现了超小的Ir和Ir0.4Ru0.6纳米粒子分散.
结论:
- 商业ATO支不适合用于高温OER应用,因为它们会迅速恶化.
- 需要进一步的研究来开发基于贵金属的OER电催化剂的稳定和高效支.
- 如果支材料缺乏稳定性,仅仅优化纳米粒子分散是不够的.
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