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多维Ni@TiN/CNT异构与并联催化用于高效的电化学化物降解为氨

Zhijie Cui¹, Pengwei Zhao², Honghai Wang¹

¹School of Chemical Engineering and Technology, National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Hebei University of Technology, Tianjin, 300130, P.R. China.

Angewandte Chemie (International ed. in English)

|March 25, 2025

概括

一种新型的催化剂,Ni@TiN/CNT,通过电化学还原有效地将化物转化为氨. 这种耐用材料表现出卓越的性能和稳定性,提供可持续的氨合成途径.

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:

电化学化物还原反应 (NO2RR) 是氨 (NH3) 合成的一个有希望的可持续途径.
开发高效和稳定的NO2RR催化剂仍然是一个重大挑战.

研究的目的:

设计和合成一种用于增强NO2RR的新型异构催化剂.
研究新材料的催化机制和稳定性.

主要方法:

在MXene衍生的TiN (Ni@TiN/CNT) 上制造碳纳米管 (CNT) 封装的Ni纳米粒子 (NP),使用盐蚀刻和化学蒸汽沉积.
电化学表征包括氨产率和法拉第效率测量.
密度函数理论 (DFT) 计算以阐明催化机制.

主要成果:

Ni@TiN/CNT 在 -0.7 V 和 RHE 之间实现了高的 NH3 产率 (15.6 mg h-1 mgcat.-1) 和法拉第效率 (95.6%) .
催化剂表现出异常的循环稳定性,60个循环后性能几乎没有减弱.
使用Ni@TiN/CNT作为阴极的Zn-酸盐电池表现出高功率密度 (9.6 mW cm-2) 和NH3合成性能.

结论:

Ni@TiN/CNT催化剂有效地利用一个双重机制,TiN激活酸盐,Ni提供.
通过防止活性部位降解,CNT结构增强了催化剂的稳定性.
这项工作提出了一项新的策略,用于开发持久高效的NO2RR电催化剂与协同活动站点.

关键词:

氨的合成氨的合成连锁邮件效应是一个连锁邮件效应.亚酸盐的还原反应反应协同催化剂的协同催化酸酸酸盐电池的电池是什么

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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.