无支的氧化用于高效的质子交换膜水电解
Yubo Chen1,2,3,4, Chencheng Dai5,6, Qian Wu5
1Hydrogen Energy Institute, Zhejiang University, Hangzhou, P. R. China. chen_yu_bo@zju.edu.cn.
Nature communications
|March 20, 2025
概括
研究人员开发了一种新的,无支的催化剂,使用分子自组装来进行质子交换膜水电解. 这一进步最大限度地减少了的使用,同时提高了水分裂应用中的催化剂性能和效率.
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:
- 质子交换膜水电解器 (PEMWE) 需要高效的膜电极组件 (MEAs).
- (Ir) 的高成本和稀缺性需要减少PEMWE中的催化剂负载.
- 开发无支催化剂对于推进PEMWE技术至关重要.
研究的目的:
- 为PEMWE开发一种高性能,无支的催化剂.
- 研究一种基于金属氧化物的分子自我组装策略,用于催化剂合成.
- 评估MEA和PEMWE中新型Ir催化剂的催化活性和耐久性.
主要方法:
- 利用基于金属氧化物的分子自我组装策略来合成无支的Ir催化剂.
- 描述了催化剂结构,揭示了密集的孤立单个IrO6H8八面体,形成分层多孔的Ir氧化物粒子.
- 制造了MEA,并在PEMWE系统中测试了它们的性能.
主要成果:
- 在MEA中实现了5.31s-1在1.52V的高周转频,用于无支的Ir催化剂.
- 在电池电压<1.75V时,在4.0 A cm−2处,在0.375 mg cm−2.2的低IR负载下,证明了PEMWE的优异性能.
- 自组装策略导致了微米大小的层次性多孔的Ir氧化物颗粒.
结论:
- 开发的无支的Ir催化剂显示了高效和成本效益的PEMWE的巨大潜力.
- 基于金属氧化物的分子自我组装方法为创建先进的无支催化剂提供了通用策略.
- 这项工作有助于大规模实施通过水电解实现可持续气生产.
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