适应合成模型的海姆/Cu站点,以节能电催化氧降低反应反应的节能电催化氧
Jia Meng1, Haonan Qin1, Haitao Lei1
1Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.
Angewandte Chemie (International ed. in English)
|November 3, 2023
概括
一种新型的 - 珊瑚化合物与悬浮的离子有效催化了4电子氧降解反应 (ORR). 这一突破提供了一个有前途的电催化剂,模仿生物系统提高能源效率.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 生物有机化学 生物有机化学
背景情况:
- 细胞染色体c氧化酶利用4电子氧降解反应 (ORR) 的heme/Cu位点,CuI协助O2激活.
- 合成的Fe-甲/Cu复合物往往由于产生活性CuI物种的热力学障碍而表现出中度的ORR活性.
研究的目的:
- 为4电子氧降解反应 (ORR) 开发一种节能电催化剂.
- 研究第二球氧化还原活性金属离子在促进O2结合和激活中的作用.
主要方法:
- 合成和表征一个Co-corrole/Co复合物 (1-Co) 的合成和表征,该复合物包含一个位于Co corrole.上方的CoII离子.
- 对ORR活动的1-Co的电化学评估,包括半波电位测量.
- 与CuII或ZnII结合的Co冠醇复合体进行比较研究.
主要成果:
- 1-Co复合体表现出了出色的电催化ORR活性,半波潜力为0.89V与RHE.
- 1-Co 性能优于 CuII 或 ZnII 的类似复合物,突出了悬挂的 CoII 离子的特殊好处.
- 发现悬浮的 CoII 离子可以在热力学和动态上增强 O2 的结合,类似于生物的 CuII 离子.
结论:
- 开发的Co-corrole/Co复合体代表了一个非凡的ORR电催化剂.
- 这项研究强调了第二球氧化还原活性金属离子在促进ORR的O2激活方面发挥的关键作用.
- 这项工作为设计灵感来自生物系统的先进电催化剂提供了洞察力.
相关概念视频
Redox Equilibria: Overview
565
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
565
Oxidation-Reduction Reactions
65.1K
Oxidation–Reduction Reactions
65.1K
Redox Reactions
19
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
19
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
Oxidation and Reduction of Organic Molecules
6.7K
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...
6.7K
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
![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)

