调节阴离子和水运输,通过离子体涂层进行增强的CO电解
Muflih A Adnan1,2, Shariful Kibria Nabil1, Karthick Kannimuthu1
1Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive, NW, Calgary, Alberta, T2N 1N4, Canada.
ChemSusChem
|November 3, 2023
概括
研究人员通过将超薄的离子体应用于铜阴极,改进了一氧化碳电还原 (COR) 进行化学能量转换. 这提高了生产有价值的多碳化学品 (如乙烯和乙醇) 的效率和稳定性.
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:
- 化学工业的电气化是能源转型的关键.
- 将一氧化碳电还原 (COR) 制成多碳 (C2+) 产品是一个有前途的技术.
- 电离体交叉和水扩散阻碍了COR的效率和选择性.
研究的目的:
- 为了解决科尔的电离交叉和水扩散挑战.
- 为了提高COR中的铜阴极的性能.
- 提高C2+产品生成的效率和稳定性.
主要方法:
- 在喷的铜阴极上直接沉积一颗超薄的Nafion离子体.
- 使用电化学测试来评估COR的性能.
- 在长时间内评估系统效率和运行稳定性.
主要成果:
- 在100mA/cm2时,实现了21%的全电池能效,将CO转化为乙烯 (C2H4).
- 在乙烯生产中经过200多小时的稳定运行.
- 在CO转化为乙醇 (C2H5OH) 生产方面实现了创纪录的17%的能效.
结论:
- 在阴极上超薄的离子体沉积有效地抑制了阴离子交叉和水扩散.
- 这种方法显著提高了COR系统的效率,选择性和稳定性.
- 该方法提供了一个可扩展的解决方案,通过电还原生产高价值化学品.
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