生物启发的二氧化铁复合体与质子穿和电催化进化电催化活性接体
Pankaj Kumar1, Bharath M1, Anjumun Rasool2
1Department of Chemistry, Ashoka University, Sonipat, Delhi NCR, Haryana 131029, India.
Inorganic chemistry
|July 10, 2024
概括
一个带有氧化还原活性连接体的二铁复合体催化了的进化. 它充当前催化剂,通过两电子还原形成活性物种,与桥接氧单元促进H2释放.
科学领域:
- 无机化学 无机化学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 开发高效的催化剂以促进的进化对于可持续能源至关重要.
- 带有氧化还原活性连接体的二铁复合物为催化应用提供了有前途的途径.
研究的目的:
- 合成和表征一种新的μ-oxo二铁复合物与一种来自 thiazoline 的配体.
- 调查该复合体的电催化演化反应 (HER) 活动.
- 阐明HER的机制,包括连接体和酸的作用.
主要方法:
- 合成和表征μ-oxo二铁复合物.
- 电化学分析 (循环电压测量) 用于研究氧化还原行为和催化活性.
- 福里埃变换红外光谱法 (FTIR) 用于识别活跃物种.
- 密度函数理论 (DFT) 计算用于研究反应途径和中间体.
主要成果:
- 合成的[Fe(μ-O) -Fe]复合体在二甲基形式胺中与各种有机酸一起显示出电催化HER活性.
- 电化学分析显示,该复合物是一种前催化剂,通过两电子的减少产生活性物种.
- FTIR和DFT的研究表明,活性催化剂具有桥接氧单元和传递质子的 thiazolinium 分子.
- 该机制涉及逐步的电子转移和质子化,根据酸强度提出了ECEC或EECC通路.
结论:
- 微氧二铁复合物有效催化的演化.
- 催化机制涉及二铁核,桥接氧单元和氧化还原活性 thiazoline 连接体之间的独特相互作用.
- 了解这些途径为设计HER的先进电催化剂提供了洞察力.
更多相关视频
06:39Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells
Published on: October 20, 2023
2.8K
10:21Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
8.4K
相关概念视频
Electron Transport Chain: Complex III and IV
7.3K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
7.3K
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
Electron Transport Chain: Complex I and II
12.8K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
12.8K
Redox Equilibria: Overview
558
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...
558
Redox Reactions
55.6K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
55.6K
Ladder Diagrams: Redox Equilibria
447
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
447
![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)