通过协调工程选择性激活格子氧气位点,以提高氧气进化反应的活性和稳定性
Guikai Zhang1,2, Jiajing Pei1, Yueshuai Wang3
1Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China.
Angewandte Chemie (International ed. in English)
|June 15, 2024
概括
这项研究引入了一种新的策略,以提高基于的氧演化反应 (OER) 催化剂的稳定性和活性. 通过选择性地激活与Ru和Zn合的Co3O4催化剂中的晶格氧,研究人员实现了卓越的性能和耐用性.
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:
- 基材料是有效的氧化演化反应 (OER) 催化剂,但由于Ru过氧化和晶格氧气参与而遭受不稳定性.
- 不稳定性限制了基于的先进OER催化剂的实际应用.
研究的目的:
- 制定一项战略,以提高基于的OER催化剂的活性和稳定性.
- 调查格子氧激活在改善催化剂性能中的作用.
主要方法:
- 合成与 (Ru) 和 (Zn) 联合合的旋转型Co3O4电催化剂.
- 氧化演化反应 (OER) 活性和性介质中的长期稳定性的电化学测试.
- 实验验证与理论模拟相结合,以阐明催化机制.
主要成果:
- 合成的Ru和Zn联合合的Co3O4在性OER的10mA cm-2时表现出172mV的超低超电位.
- 催化剂表现出极好的长期稳定性,在10 mA cm-2.2下保持100小时的性能.
- 实验和理论数据证实,在Ru和Zn原子附近的晶格氧气位高度活跃,减少反应障碍,增强结构稳定性.
结论:
- 在Ru站点周围选择性激活格子氧是改善OER活动和稳定的有效策略.
- 配合Ru-Zn的Co3O4催化剂为开发强大高效的OER电催化剂提供了一个有前途的途径.
- 这项工作为增强基催化剂性能的晶格氧介导机制提供了新的见解.
相关概念视频
Metal-Ligand Bonds
20.7K
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...
20.7K
Introduction to Mechanisms of Enzyme Catalysis
8.1K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
8.1K
Crystal Field Theory - Octahedral Complexes
26.3K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.3K
Catalysis
26.9K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.9K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.1K
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.
10.1K
Oxidation-Reduction Reactions
64.7K
Oxidation–Reduction Reactions
64.7K


