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微波可再生,联合化协调多孔碳催化剂用于固定

Peiji Deng^1,2,3,4, Yixian Liu¹, Yunliang Liu¹

¹School of Chemistry and Chemical Engineering, Institute for Energy Research of Jiangsu University, Zhenjiang 212013, Jiangsu, China.

ACS applied materials & interfaces

|September 12, 2023

概括

研究人员开发了一种新的Ni/Zn双金属催化剂,通过电化学降解反应 (NRR) 来合成氨. 这种具有成本效益的催化剂为能源密集的哈伯-博斯工艺提供了一个可持续的替代方案.

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
催化剂是一种催化剂.
绿色化学绿色化学

背景情况:

哈伯 - 博什工艺主导着全球氨 (NH) 合成,但非常耗能,并对碳排放有很大的贡献.
电化学降解反应 (NRR) 在温和条件下为NH₃生产提供了一个有前途的替代方案.
在NRR的一个关键挑战是通过电催化剂将强-三键 (NN) 分裂的困难.

研究的目的:

通过NRR开发一种成本效益高效的电催化剂,用于通过NRR合成氨.
研究双金属兴奋剂和多孔碳结构在提高NRR性能方面的作用.
用理论计算来探索拟议的催化剂的机制.

主要方法:

一种类似叶片的MOF衍生的Ni/Zn双金属共化协调多孔碳 (Ni/Zn-NPC) 电催化剂的合成.
在Na2SO4电解质中,对Ni/Zn-NPC催化剂用于NH₃生产的电化学评估.
微波处理用于催化剂再生和稳定性增强.
密度函数理论 (DFT) 计算以阐明NRR机制和活性位点.

主要成果:

Ni/Zn-NPC催化剂实现了高NH₃的生产率为22.68μg h^-1 mg_cat^-1在-1.0V与RHE.
微波处理在再生催化剂和提高其稳定性方面被证明是有效的.
DFT研究表明,微量Ni兴奋剂优化了局部协调环境和Zn位点上的N₂吸附,促进NRR.

结论:

开发的Ni/Zn-NPC材料是一种高效和可再生的电催化剂,用于可持续的氨合成.
对于高NRR活性来说,Ni/Zn双金属兴奋剂和协调的多孔碳结构的协同效应至关重要.
这项工作为电化学N2减少的催化剂设计提供了宝贵的见解,并为更绿色的氨生产提供了潜在的途径.

关键词:

电催化剂是一种电催化剂.电催化降低的电催化剂微波再生微波再生的方法有孔的碳催化剂是有孔的碳催化剂.短暂的光感应电压引起的电压.

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