结合有机框架支持原子Bi-N2O2 网站高效电催化CO2 减少
Changli Wang1, Zunhang Lv1, Yarong Liu1
1Key Laboratory of Cluster Science Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Advanced Technology Research Institute (Jinan), Advanced Research Institute of Multidisciplinary Science, School of Materials Science and Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No. 5, South Street, Zhongguancun, Haidian District, Beijing, 100081, China.
一种新型的--氧 (Bi-N2O2) 单原子催化剂在结有机框架 (HOF) 上显示出极好的电催化二氧化碳减排性能. 这种催化剂可实现高效率和稳定性,将二氧化碳转化为酸盐.
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:
- 单原子催化剂 (SAC) 对于理解电催化二氧化碳减排 (CO2RR) 中的结构-活性关系至关重要.
- 目前用于合成框架衍生的SAC的方法在站点配置中缺乏精度.
- 制定明确的SAC对于推进CO2RR技术至关重要.
研究的目的:
- 报告一个新的Bi-N2O2单个原子位点催化剂,支持结有机框架 (HOF).
- 为了研究这种用于减少二氧化碳的新催化剂的电催化性能.
- 为设计具有可调节金属中心的SAC建立一个多功能平台.
主要方法:
- 在HOF的 (110) 平面上合成了一个新的Bi-N2O2位点.
- 在流电池设置中进行电催化CO2降解反应 (CO2RR) 测试.
- 密度函数理论 (DFT) 计算以阐明反应机制.
主要成果:
- Bi1-HOF催化剂在一个广泛的潜在窗口 (1.4V) 中实现了90%以上的法拉代克效率,用于HCOOH生产.
- 部分电流密度在113.3至747.0mA cm-2之间,显示出高活性.
- 催化剂在高电流密度 (100400 mA cm−2) 下表现出极好的长期稳定性 (>30 h).
结论:
- 在HOF上的新型Bi-N2O2位点通过定向电子转移有效地激活和减少CO2.
- 本研究提出了一种多功能方法,用于创建CO2RR的各种M-N2O2位点.
- 这些发现扩大了研究二氧化碳减排催化中的结构-活性关系的范围.
更多相关视频
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
相关概念视频
Covalent Bonding and Lewis Structures
Thermal and Photochemical Electrocyclic Reactions: Overview
Covalent Bonds
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
Polar Covalent Bonds
Lewis Structures of Molecular Compounds and Polyatomic Ions
Electron Carriers
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
