远距离的作用:有机离子诱导的界面水的远程组织增强了进化和氧化动力学
Kaiyue Zhao1, Hao Yu1, Haocheng Xiong1,2
1College of Chemistry and Molecular Engineering, Peking University Beijing 100871 China b_xu@pku.edu.cn.
Chemical science
|October 20, 2023
概括
大量的有机酸通过构建界面水来增强进化和氧化反应 (HOR/HER). 这种非局部效应提高了电催化剂的性能,这对经济至关重要.
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
- 物理化学 物理化学
背景情况:
- 在经济中,高效的电极-电解质接口对于进化和氧化反应 (HOR/HER) 是至关重要的.
- 目前的HOR/HER催化剂描述器主要集中在表面-吸附剂相互作用上,忽视了远程影响.
研究的目的:
- 为了研究大型有机对HOR/HER动力学的影响.
- 阐明这些子影响界面水结构和电催化活性的机制.
主要方法:
- 电动力学分析 电动力学分析
- 分子动力学模拟的模拟.
- 在现场进行光谱学调查.
主要成果:
- 大量的有机酸盐,如四氨基,通过诱导界面水分子的远程排序来增强HOR/HER动力学.
- 这些阴离子,即使位于海尔姆霍尔茨外平面之外,也会促进联水链,将电极连接到散装电解质.
结论:
- 庞大的疏水性离子体的结构形成能力提供了一个非局部机制,以提高HOR/HER的电催化性能.
- 这一发现为通过控制水界面结构来设计先进的电催化剂开辟了新的途径.
更多相关视频
10:21Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
8.4K
06:39Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
2.9K
相关概念视频
Intermolecular Forces
58.6K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
58.6K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.5K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.5K
Acid-Catalyzed Hydration of Alkenes
14.2K
Alkenes react with water in the presence of an acid to form an alcohol. In the absence of acid, hydration of alkenes does not occur at a significant rate, and the acid is not consumed in the reaction. Therefore, alkene hydration is an acid-catalyzed reaction.
14.2K
Aldehydes and Ketones with Water: Hydrate Formation
3.3K
An oxygen-based nucleophile, like water, can undergo addition reactions with aldehydes and ketones. The reaction leads to the formation of hydrates, also referred to as 1,1-diols or geminal diols.
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
3.3K
Catalysis
27.0K
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.
27.0K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K
