在Cu激活Co电极上通过NOx减少进行格拉姆级NH3电合成
Dong-Xue Liu1, Zhe Meng1, Yong-Fu Zhu1
1Key Laboratory of Automobile Materials, Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun, 130022, China.
Angewandte Chemie (International ed. in English)
|November 12, 2023
概括
高速氨合成是通过使用铜激活电极的电化学化还原来实现的. 该方法为工业生产氨的哈伯-博斯工艺提供了一个有希望的,节能的替代方案.
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:
- 哈伯 - 博什工艺虽然对氨生产至关重要,但非常能源密集.
- 环境电化学氨基合成提供了一个可持续的替代方案,但在实现工业规模的电流密度和产量方面面临挑战.
- 化物减少是电化学氨基合成的新兴途径.
研究的目的:
- 通过化物还原开发一种高速氨合成方法.
- 为了研究双极膜电解器中铜激活电极的性能.
- 为了证明这种新氨生产技术的大规模可行性.
主要方法:
- 使用双极膜 (BPM) 电解器与Cu激活的Co泡电极用于化物减少.
- 在H型电池配置中使用性电解质.
- 进行现场实验和理论计算,以了解反应机制.
主要成果:
- 实现了高电流密度为2.64 A cm-2的96.45%的法拉第效率生产氨.
- 获得了279.44毫克小时-1厘米-2.2的高氨产率.
- 使用自制反应堆,证明了大规模生产4.11g h-1的氨.
结论:
- 用Cu激活的Co电极通过化还原显著提高了氨合成的速度和效率.
- 双极膜电解器设计有效地保持离子平衡和电解质水平,以保持持续运行.
- 这种方法显示出实用,大规模和可持续的氨生产的巨大潜力.
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