在Dzyaloshinskii-Moriya相互作用下,靠近诱导的磁力促进了水的氧化
Xiao Ren1,2,3,4, Lei Tao4, Tianze Wu3,4
1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Journal of the American Chemical Society
|February 9, 2026
概括
我们使用接口Dzyaloshinskii-Moriya相互作用 (DMI) 来诱导氧化 (IrO2) 催化剂中的自旋极化. 这显著增强了水的氧化活性,为催化剂设计提供了新的策略.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 表面化学 表面化学
背景情况:
- 旋转极化对于多电子水氧化动力学至关重要.
- 像IrO2这样的基准催化剂缺乏用于旋转控制的内在铁磁性.
研究的目的:
- 在Co/IrO2双层中利用接口Dzyaloshinskii-Moriya相互作用 (DMI).
- 为了诱导表面IrO2中的自旋极化状态,以增强催化.
主要方法:
- 制造Co/IrO2双层的工艺.
- 铁磁共振光谱法用于量化旋转极化.
- 旋转极化密度函数理论 (DFT) 的计算.
主要成果:
- 由DMI驱动的旋转极化将氧演化反应 (OER) 活动提升了1个数量级.
- 在300mV超电位下,实现了4.17s-1的转速频率.
- 据DFT透露,DMI可以稳定铁磁IrO2并降低反应障碍.
结论:
- 接口DMI是一种可行的策略,可以激活非磁性氧化物中隐藏的自旋状态.
- 这种方法为增强水氧化催化剂提供了一条新的途径.
- 通过Cu间隔器消除DMI可以灭磁性和催化活性.
相关概念视频
Oxidation Numbers
42.9K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
42.9K
The Eukaryotic Promoter Region
18.9K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
18.9K
The Eukaryotic Promoter Region
4.0K
4.0K
Pyruvate Oxidation
169.2K
After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells.
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
169.2K
Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
Oxidation-Reduction Reactions
75.8K
Oxidation–Reduction Reactions
75.8K


