缓解CO2电解的双极膜中气体诱导的损伤
Robert Fischer1, Matthieu A Dessiex1,2, Lorenz Gubler1
1PSI Center for Energy and Environmental Sciences 5232 Villigen PSI Switzerland robert.fischer@esrf.fr felix.buechi@psi.ch.
概括
双极膜能够有效地进行二氧化碳电解,但随着时间的推移而降解. 工程孔隙离子交换层可以防止降解,提高耐用性和二氧化碳转化效率.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 双极膜对二氧化碳电解有希望,提供诸如纯水料和防止盐沉等优势.
- 然而,结构退化限制了它们的长期运行稳定性.
研究的目的:
- 系统地研究二极膜在二氧化碳电解过程中的降解机制.
- 制定减轻降解和提高二氧化碳电解系统的耐用性和效率的战略.
主要方法:
- 利用X射线断层显微镜分析膜脱层和阳极催化剂层损伤.
- 研究了电流密度和累积电荷对降解途径的影响.
- 通过使用纳米粒子-离子体喷雾涂层设计的多孔离子交换层.
主要成果:
- 发现膜分层取决于电流密度.
- 阳极催化剂层降解与累积电荷相缩放,表明不同的降解途径.
- 设计的微孔离子交换层有效抑制了降解并提高了CO2电解性能.
结论:
- 双极膜内的气体运输工程对于提高二氧化碳电解的耐用性和效率至关重要.
- 多孔离子交换层为减轻降解问题提供了可行的解决方案.
- 开发的喷涂方法为制造改进的膜电极组件提供了有效的途径.
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