相关实验视频

Updated: Jul 17, 2025

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

通过对Zn-Cu催化剂上的N-中间吸附进行调节,促进电催化酸盐到氨的转化

Limin Wu^1,2, Jiaqi Feng¹, Libing Zhang^1,2

¹Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid and Interface and Thermodynamics, Center for Carbon Neutral Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Angewandte Chemie (International ed. in English)

|September 4, 2023

概括

使用可再生能源,添加的铜纳米片有效地将酸盐转化为氨. 这种电还原方法为Haber-Bosch工艺提供了一个有希望的,环保的替代方案,实现了高效率和稳定性.

科学领域:

电化学电化学电化学
催化剂是一种催化剂.
材料科学材料科学材料科学

背景情况:

酸盐电还原为氨 (NH3) 是哈伯-博斯工艺的可持续替代方案.
缓慢的反应动力学目前限制了酸盐电还原的大规模应用.

研究的目的:

研究 (Zn) 兴奋剂对酸盐电还原的铜 (Cu) 催化剂的影响.
设计和合成高效的Zn-doped Cu催化剂,以提高NH3的生产.

主要方法:

计算研究来计算含有N的物种的结合能量和进化反应的自由能量.
合成Zn-化Cu纳米板催化剂.
电化学性能测试,包括法拉第效率和产率测量.
对兴奋剂对反应机制的影响进行了深入的实验和理论分析.

主要成果:

理论计算发现Zn是Cu催化剂的一个有前途的剂.
用Zn合的Cu纳米薄膜实现了NH3生产的最大法拉代效率98.4%.
催化剂表现出极好的产率5.8molg-1h-1和显著的循环稳定性.
在广泛的电位和酸盐度中保持了高效率 (>90% FE).

结论:

兴奋剂显著提高了Cu的电催化性能,用于酸盐转化为氨.
性能改善归因于调制的中间吸附,增强的NO2-转化,改变的*NO吸附和降低的能量屏障.
用Zn合的Cu纳米片代表了可再生能源驱动的氨合成的高效和稳定的催化剂.

关键词:

氨的合成氨的合成 Cu 催化剂催化剂电触媒溶解是一种电触媒.绿色化学绿色化学减少酸盐的使用

更多相关视频

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

相关概念视频

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.

EDTA: Auxiliary Complexing Reagents

EDTA: Auxiliary Complexing Reagents

EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...