电电极用于连续和质量高效的电化学化
Jonas Wolf1,2, Kevinjeorjios Pellumbi1,2, Sarankumar Haridas1
1Abteilung Elektrosynthese, Fraunhofer Institut für Umwelt-, Sicherheits-und Energietechnik UMSICHT, Osterfelder Straße 3, 46047, Oberhausen, Germany.
Chemistry (Weinheim an der Bergstrasse, Germany)
|December 15, 2023
概括
这项研究引入了一种新的,可持续的方法,用于使用无粘合剂的白银和铜电极进行电催化化. 优化的工艺实现了各种不和化合物的高效率和生产率.
科学领域:
- 电化学 电化学 电化学
- 可持续化学 可持续化学
- 催化剂是一种催化剂.
背景情况:
- 电催化化 (ECH) 为减少有机化合物的传统方法提供了一个可持续的替代方案.
- 目前的电极制备通常涉及粘合剂和添加剂,使该过程复杂化.
- 开发高效且可重复使用的电催化剂对于推进绿色化学至关重要.
研究的目的:
- 开发一种单步,无粘合剂和无添加剂的方法,用于生产ECH的银和铜电电极.
- 优化电极准备,以提高催化剂形态和电化学性能.
- 为了证明开发的电极在ECH反应中的广泛适用性和高性能.
主要方法:
- 在没有结合剂或添加剂的碳支上对银和铜进行一步电.
- 对沉积参数进行受控调整,以调整催化剂形态和电化学性能.
- 对2-甲基-3-丁-2-醇 (MBY) 和其他不和化合物的电催化化电极的测试.
主要成果:
- 使用优化的电极实现了MBY化93%的法拉达效率.
- 在240 mA cm−2电流密度和低催化剂负荷 (0.2 mg cm−2) 的情况下,证明了高性能.
- 获得了1.47公斤MBEgcat-1h-1批量和1.38公斤MBEgcat-1h-1连续流量的无与伦比的生产率.
- 将基质范围扩展到17种不同的C-C,C-O和N-O不和化合物,显示出普遍适用性.
结论:
- 开发的单阶段电极制备方法是高效和可持续的.
- 银和铜电电极在ECH中表现出卓越的性能和广泛的适用性.
- 这项工作为开发能够与最先进的热催化工艺竞争的电化学反应器提供了基础.
相关概念视频
Electrodeposition
638
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
638
Electrodes: Overview
1.7K
Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in...
1.7K
Potentiometry: Types of Electrodes
664
Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
664
Electrogravimetric Analysis: Overview
236
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
236
Reduction of Alkenes: Catalytic Hydrogenation
12.1K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.1K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K


