在氧降解反应中对无金属共价有机框架的溶剂效应
Xiubei Yang1,2, Yubin Fu3, Minghao Liu1
1CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210, P. R. China.
Angewandte Chemie (International ed. in English)
|February 21, 2024
概括
本研究探讨了水分子如何影响氧降解反应 (ORR) 中的共价有机框架 (COF). 基于皮里丁的COF由于优化的水相互作用和中间结合,表现出卓越的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 在电催化中,水分子与共价有机框架 (COF) 中的极点相互作用经常被忽视.
- 溶剂效应显著影响材料的电子状态和催化活性.
研究的目的:
- 为了研究溶剂对COF在氧降解反应 (ORR) 的影响.
- 设计和合成可调节位的COF,以优化水相互作用.
- 了解COF中增强ORR活动背后的机制.
主要方法:
- 合成具有不同功能的共价有机框架 (COFs) (胺,,).
- 对合成的COF进行氧降解反应 (ORR) 的电催化试验.
- 计算分析 (理论计算) 以阐明反应机制和中间结合.
主要成果:
- 有酸原子的COF显示出最高的ORR活性.
- 达到0.78V的半波潜力和0.32A/mg的质量活性,优于其他无金属的COF.
- 理论计算表明,氧化 (OOH) 中间体与氧化相邻的碳位点的结合更强.
结论:
- 溶剂效应,特别是水相互作用,对于电催化中的COF性能至关重要.
- 在COF中,皮里丁位通过优化水相互作用和中间结合来增强ORR活性.
- 这项研究通过考虑溶剂效应,为改进的电催化应用提供了设计先进的COF的见解.
相关概念视频
Oxidation and Reduction of Organic Molecules
6.6K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
The removal of an electron from a molecule, results in a...
6.6K
Properties of Organometallic Compounds
996
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
996
Metal-Ligand Bonds
20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.8K
Bonding in Metals
47.3K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
47.3K
Oxidative Cleavage of Alkenes: Ozonolysis
10.4K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.4K
Oxidation-Reduction Reactions
64.9K
Oxidation–Reduction Reactions
64.9K


