耐用薄膜多孔运输电极用于高电流密度PEM水电解
James L Young1, Diana E Beltrán1, Sarah J Blair1
1National Renewable Energy Laboratory, Golden, CO, 80401, USA.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 22, 2026
概括
通过喷雾沉积沉积的鲁氧化物 (IrO2) 催化剂为生产提供了耐用且具有成本效益的解决方案. 这种方法可以在质子交换膜水电解器中实现低负载,保持高性能并降低成本.
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
- 可持续能源 可持续能源
背景情况:
- 质子交换膜水电解器 (PEMWE) 需要昂贵的 (Ir) 基催化剂来有效生产.
- 减少PEMWE中的IR负载对于降低系统成本,同时保持性能和耐用性至关重要.
- 喷射沉积提供了一种可扩展的方法,用于创建统一的,低负载的催化剂层,具有可控的组成.
研究的目的:
- 在多孔输送电极 (PTE) 架构中研究喷射沉积的金属Ir,无形Ir氧化物和鲁Ir氧化物的活性和耐久性.
- 评估低IR负载PTE在PEMWE具有成本效益的气生产潜力.
主要方法:
- 喷射沉积用于将金属Ir,无形Ir氧化物和鲁Ir氧化物沉积在多孔的运输层上.
- 这些催化剂层的活性和耐用性在PEMWE设置中被评估,当电流密度为3 A cm−2时,负载为0.1 mg Ir cm−2.
- 测量了溶解速率和电压衰变,以评估材料的稳定性和长期性能.
主要成果:
- 金属和无形的氧化催化剂的初始活性比鲁IrO2.2高.
- 在100小时以后,Rutile IrO2在3A cm−2和0.1 mg Ir cm−2下保持了100小时以上的性能,在700小时后显示出50mV的改善.
- 鲁二氧化显示溶解速率降低了10倍以上,并实现了稳定状态电压衰变速率为6μV h−1的低度输送层和0.4 mg Ir cm−2负载.
结论:
- 在PTE中的喷射沉积的鲁IrO2为PEMWE中低负载应用提供了卓越的耐用性和稳定性.
- 使用具有最佳孔隙性和负载的鲁IrO2 PTE可以显著降低生产成本.
- 这种方法为提高绿色气发电的经济可行性提供了一个可行的策略.
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