相关实验视频
Updated: Jun 12, 2025

09:50
Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
12.7K
纠正异构接口 促进C-N合动力学 能够在超低潜力下进行高效的尿素电合成.
Mingyu Cheng1, Shao Wang1, Zechuan Dai1
1Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, 230026, Hefei, Anhui, P R. China.
Angewandte Chemie (International ed. in English)
|September 25, 2024
概括
这项研究引入了一种新的Cu/Cu2O催化剂,用于从二氧化碳和酸盐中可持续合成尿素. 催化剂通过纳米校正异面接口提高了尿素产量和效率,为传统方法提供了更绿色的替代方案.
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
- 可持续化学 可持续化学
背景情况:
- 传统的尿素合成 (Bosch-Meiser方法) 需要大量的能量.
- 从二氧化碳和酸盐的电催化尿素合成是一种可持续的替代方案.
- 由于复杂的中间体,同时提高尿素产量和法拉第效率 (FE) 是具有挑战性的.
研究的目的:
- 开发一种高效的电催化剂,用于从二氧化碳和酸盐合成尿素.
- 研究催化剂纳米结构和接口在增强尿素合成中的作用.
- 为改善C-N合提供对反应机制的见解.
主要方法:
- 制造Cu/Cu2O Mott-Schottky催化剂,通过在位电还原Cu2O纳米线进行纳米级整形异面接口.
- 超低应用电位 (0~-0.3V与RHE) 的电化学表征.
- 运行同步子辐射-里埃变换红外光谱学 (SR-FTIR) 和密度函数理论 (DFT) 计算,以研究反应中间体和机制.
主要成果:
- 取得了显著的FE (32.6-47.0%) 和大量的尿素产量 (6.08-30.4 μmol h-1 cm-2).
- 在广泛的超低应用潜力范围内证明了催化剂性能.
- 使用SR-FTIR证实了*CO中间体和C-N债券的形成.
- DFT的计算显示,Cu/Cu2O异构接口调节*CO吸附,增强C-N合动态.
结论:
- 开发的Cu/Cu2O Mott-Schottky催化剂与纳米校正异面接口为高效的电催化尿素合成提供了开创性的途径.
- 该研究提供了对C-N合和尿素生产的基于铜的异质接口催化剂的深入了解.
- 这种方法提供了一种可持续和先进的方法,用于从二氧化碳和酸盐合成尿素.
相关概念视频
Urea Cycle
44.0K
The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
44.0K
Overview of Nitrogen Metabolism
7.9K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
7.9K
Catalysis
26.7K
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.
26.7K
Interfacial Electrochemical Methods: Overview
223
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
223
Chemiosmosis
97.3K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
97.3K
Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K

