来自聚氨酸,铁和的高性能电催化剂用于减少氧气
Gang Wu1, Karren L More, Christina M Johnston
1Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
概括
新的非贵金属催化剂为燃料电池中的氧降解反应 (ORR) 提供了与相比具有成本效益的替代品. 这些催化剂表现出高活性和稳定性,为可负担的汽车动力铺平了道路.
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
- 催化剂是一种催化剂.
背景情况:
- 的高成本阻碍了采用聚合物电解质燃料电池的发展.
- 开发成本有效的催化剂用于氧降解反应 (ORR) 对于燃料电池的广泛应用至关重要.
研究的目的:
- 开发和评估用于氧降解反应 (ORR) 的非贵金属催化剂.
- 为了实现与基催化剂可比的性能,以可持续的成本为包括汽车在内的高功率应用.
主要方法:
- 使用聚氨作为碳模板的前体.
- 通过高温处理合成含铁和的催化剂.
- 在燃料电池应用中评估了催化剂性能.
主要成果:
- 开发了非贵金属催化剂,其活性接近基系统.
- 在0.4V的燃料电池电压下达到700小时的显著稳定性.
- 证明了优异的四电子选择性,过氧化产量低于1.0%.
结论:
- 基于铁和的非贵金属催化剂为ORR提供了的可行,具有成本效益的替代品.
- 这些催化剂显示了使高功率燃料电池应用成为可能的潜力,例如在汽车行业.
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