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Cu纳米集群和Rh单原子修饰的N-化碳用于酸盐电还原到氨的电还原

Wenhan Dai¹, Yahan Fang¹, Junfeng Huang¹

¹State Key Laboratory of Natural Product Chemistry, College of Chemistry and Chemical Engineering, School of Materials and Energy, and Electron Microscopy Centre of Lanzhou University, Lanzhou University, Lanzhou 730000, China.

Inorganic chemistry

|October 1, 2025

概括

这项研究开发了一种用于将废水中的酸盐污染转化为氨的新型催化剂. 催化剂有效地减少酸盐,为废水处理和氨合成提供可持续的解决方案.

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
环境科学环境科学

背景情况:

废水中的酸盐 (NO3-) 污染对环境和健康构成重大风险.
同时将酸盐转化为氨 (NH) 对于可持续的资源管理和污染控制至关重要.

研究的目的:

合成和描述一种用于高效电化学酸盐降解氨的新型催化剂.
研究催化机制并优化废水处理的性能.

主要方法:

通过ZIF-8热解,在N-化碳上合成Cu纳米团修饰的单个Rh原子.
电化学酸盐还原反应 (NO₃^-RR) 的测量.
先进的结构特征包括XRD,HAADF-STEM和XPS.

主要成果:

优化的Cu_97.5Rh_2.5/NC催化剂表现出高的NH₃产量 (1252.22 μg·h^-1 mg_cat^-1) 和选择性 (89.13%) 在-1.0V与RHE.
在NH₃和93.34%的NO₃^-转换下达到84.53%的法拉代效率,在-1.1V与RHE之间.
机理学研究证实了Rh在增强*H生成和NO3吸附中的作用.

结论:

原子经济催化剂的合理设计使得从富含酸盐的废水中实现高效的NH3电合成.
开发的催化剂有效地降低了酸盐水平,以满足世卫组织的标准.
这种方法为废水整治和有价值的化学品生产提供了可持续的途径.

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