通过D频段编排来定制异核双单原子和集群组件,用于减少氧的反应反应
Jingshuai Li1, Bin Jiang1, Liu Yang2
1School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
Angewandte Chemie (International ed. in English)
|August 28, 2024
概括
使用双单原子和原子集群配置 (FeCo-DSA/AC) 的新催化剂设计显著提高了氧降解反应 (ORR) 的性能. 这一突破通过优化活性部位以获得更高的催化活性来增强Zn-空气电池.
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:
- 单原子 (SA) 和原子集群 (AC) 催化剂对氧减少反应 (ORR) 显示出希望.
- 精确的结构控制和对这些先进催化剂的机制理解仍然具有挑战性.
- 开发高效的电催化剂对于像气电池这样的能量转换技术至关重要.
研究的目的:
- 开发一种针对双单原子和原子集群催化剂的有针对性的合成的新策略.
- 研究这些多元组合的增强ORR催化活性和机制.
- 展示这些催化剂在Zn-空气电池等实际应用中的潜力.
主要方法:
- 在共价有机聚合物中使用金属原子交换的积极集群锁定策略.
- 热热解合成FeCo双单原子和原子集群 (FeCo-DSA/AC) 配置.
- 电化学测试 (ORR半波潜力) 和全面的理论分析 (轨道杂交).
主要成果:
- 成功合成了具有精确控制的Fe,Co和FeCo配置的FeCo-DSA/AC催化剂.
- 与Fe和Co-only对应物相比,实现了优越的ORR半波潜力 (分别提高了18mV和49mV).
- 在 Zn-空气电池中表现出色的性能,归因于靠近费米水平的优化轨道杂交.
结论:
- 集群封锁战略使得混合单原子集群电催化剂的有针对性的设计成为可能.
- 双单原子和原子集群站点之间的协同效应增强了ORR活动.
- 优化的电子结构 (dz2-dxz和O 2p轨道杂交) 促进了关键反应步骤,提高了催化效率.
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
8.3K
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
18.1K
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.0K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.0K
Redox Reactions
55.5K
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...
55.5K
Oxidation and Reduction of Organic Molecules
6.3K
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...
6.3K
Oxidation-Reduction Reactions
64.5K
Oxidation–Reduction Reactions
64.5K
Oxidative Cleavage of Alkenes: Ozonolysis
10.1K
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.
10.1K
Redox Equilibria: Overview
544
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...
544
