铜增强的CO2在SOEC中的电还原.
Umer Draz1, Elisabetta Di Bartolomeo1, Anna Paola Panunzi1
1Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy.
ACS applied materials & interfaces
|February 9, 2024
概括
一种新的用铜替代的矿氧化物 (LSFCu) 显示出作为在固体氧化物电解细胞 (CO2-SOECs) 中二氧化碳电解的无电极的前景,克服了当前材料的局限性.
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:
- 没有 (Co) 和 (Ni) 的电催化剂对于将固体氧化物电解电池 (CO2-SOEC) 商业化至关重要,因为预计到2050年对这些金属的关键需求.
- 当前的CO2-SOEC电极面临着结构降解和碳沉积等挑战,特别是在高超电位时.
研究的目的:
- 设计和合成一种用于CO2-SOECs的新型多用途电极材料,避免使用和.
- 评估一个用铜替代的矿氧化物作为CO2-SOEC中阳极和阴极应用的可行替代品的潜力.
主要方法:
- 使用溶液燃烧方法合成了La0.6Sr0.4Fe0.8Cu0.2O3-δ (LSFCu).
- 材料的特征包括X射线粉末衍射与瑞特维尔德精细化,X射线光电子光谱,热重力学分析和电导率评估.
- 在二氧化碳电解中评估了电化学性能,包括区域特定的电阻测量和在850°C的对称CO2-SOEC中进行测试.
主要成果:
- 合成的LSFCu材料表现出结构稳定性和良好的导电性.
- 作为二氧化碳电解的阳极和阴极材料,LSFCu表现出有希望的性能.
- 一个对称的基于LSFCu的CO2-SOEC在1.5V和850°C时实现了1.22A/cm2的显著电流密度.
结论:
- 在La0.6Sr0.4FeO3-δ中替代铜为CO2-SOECs开发无和电极提供了一个有希望的途径.
- 开发的LSFCu材料显示出作为多用途电极的潜力,解决了当前CO2-SOEC技术的局限性.
- 这项工作展示了一种高性能,对称的CO2-SOEC的概念验证,使用了一种新的,地球上丰富的催化剂.
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