基于分层双纳米板的金属有机框架用于中性介质中的增强电催化氧化水
Silvia Gutiérrez-Tarriño1, José Luis Olloqui-Sariego2, Juan José Calvente2
1Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022 Valencia, Spain.
Journal of the American Chemical Society
|October 30, 2020
概括
一个新的金属有机框架 (2D-Co-MOF) 在中性pH下显示出优异的氧演化反应 (OER) 电催化. 这种材料具有独特的记忆效果和卓越的性能,
科学领域:
- 材料科学
- 电化学
- 纳米技术
背景情况:
- 对氧化演化反应 (OER) 开发高效的电催化剂对于能量转化技术至关重要.
- 基于的金属有机框架 (MOF) 是有前途的,但通常需要特定的条件来实现最佳性能.
- 了解MOF中的结构活动关系是设计先进催化剂的关键.
研究的目的:
- 合成和描述一个新的二维金属有机框架 (2D-Co-MOF).
- 对2D-Co-MOF的电化学特性和电催化活性进行研究.
- 阐明在中性pH下提高OER性能背后的机制.
主要方法:
- 合成了多层金属有机框架 (2D-Co-MOF) 与胺配体.
- 在水溶液中将3D框架分层成2D纳米片.
- 一个2D-Co-MOF@Nafion修饰石墨电极的制造.
- 在中性水溶液中进行电化学激活和OER性能测试.
主要成果:
- 2D-Co-MOF具有可逆的分层恢复过程,表现出"记忆效应".
- 电化学激活显著增强离子迁移和电子转移,形成活性物种.
- 激活的2D-Co-MOF@Nafion复合材料在中性pH下表现出卓越的OER电催化活性和强度.
- 在400mV的超电位下,实现了0.034s-1的转换频率 (TOF),超过了类似的催化剂.
结论:
- 分层的2D-Co-MOF结构可在中性pH下促进高效的OER电催化.
- 这种机制可能涉及对单一的Coo (IV) -oxo或Coo (III) -oxyl中心的水核友攻击.
- 含有的芳香配体有助于高电化学效率,类似于色素.
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
4.0K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.4K
相关概念视频
02:51Metal-Ligand Bonds
23.1K
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...
23.1K
01:08Electrodeposition
1.0K
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
1.0K