实现非传统的并列酸盐减少,以实现由Co,Fe双位结合金属有机框架实现的高效氨电合成
Shengji Tian1, Runjie Wu2, Hengjie Liu3
1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Laboratory of Space Power-Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P.R. China.
这项研究引入了CoFe-cMOFs,用于高效的电化学酸盐-氨降解 (NO3RR). 一个非常规的途径增强了选择性和氨产量,避免了有害的副产品.
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
- 催化剂是一种催化剂.
背景情况:
- 电化学酸盐降解为氨 (NO3RR) 是氨合成的可持续途径.
- 挑战包括多电子转移和不稳定的中间体,阻碍选择性和效率.
研究的目的:
- 为NO3RR开发高效的Co,Fe双金属合金属有机框架 (CoFe-cMOFs).
- 为了阐明一种非传统的 [6+2] 电子转移合路径,用于选择性氨生产.
主要方法:
- CoFe-cMOFs 的合成.
- 对NO3RR性能进行电化学评估.
- 使用Zn-NO3-电池原型的机械研究.
主要成果:
- CoFe-cMOFs通过一个 [6+2] 串联路径使NO3RR成为可能,Fe位点将酸盐降低到氧胺,随后是Co-site质子化.
- 在中性电解质中实现了94.3%的NH3产生法拉代效率和14.1 mg h-1 cm-2的产率.
- 一个Zn-NO3-电池原型展示了3.6mW cm-2的峰值功率密度和稳定的氨产量.
结论:
- 这项研究提出了一项机械突破,用于调节选择性电化学氨合成的并联路径.
- CoFe-cMOFs为高效和选择性的NO3RR提供了一个有前途的平台.
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