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电极支持的质子陶电解细胞用于在中间温度下通过电化学促进的氨合成
Moe Okazaki1, Junichiro Otomo2
1Department of Environment Systems, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8561, Japan.
ACS omega
|November 6, 2023
概括
这项研究开发了质子陶电解细胞 (PCEC) 以在较低温度下高效的电化学氨合成. 新的Ni-BaZrYO阴极设计显著提高了氨形成率,使其能够与水电解系统进行潜在的集成.
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:
- 质子陶电解细胞 (PCEC) 显示出电化学氨合成的前景.
- 挑战包括法拉代的低效率和高工作温度,限制了氨的形成速度.
研究的目的:
- 开发使用新型Ni-BaZrYO阴极进行氨电合成的电极支持PCEC.
- 在混合N2和H2大气中,在降低的操作温度下实现高效的氨合成.
主要方法:
- 使用无贵金属的Ni-BaZr0.8Y0.2O3-δ阴极和带自旋涂层的质子导电解质制造电极支的PCEC.
- 在400°C的单反应堆中使用N2和H2联合养的单反应堆.
- 作为应用电压的函数,对氨形成率的研究.
主要成果:
- 氨的形成率在施加电压下非法拉达式地增加,在400°C时达到1.1 × 10−8 mol s−1 cm−2.
- 与之前的研究相比,工作温度降低了150°C左右.
- 性能改善归因于Ni阴极通过电化学促进催化.
结论:
- 开发的PCEC使得在中间温度 (400°C) 上能够有效地进行氨电合成.
- 低欧米损耗和改善接口接触电阻对于实现足够的正极极化至关重要.
- 建议采用水电解和氨合成系统的组合,利用副产品回收利用.
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