超小型VMnMoSx集群具有双功能OER/HER性能,用于高效的水分离
Yu Zhang1,2, Jiayang Shi2, Zhiguo Wang1
1Hebei Key Laboratory of Energy Storage Technology and Integrated Energy Utilization, North China Electric Power University, Baoding, Hebei, China.
Small methods
|December 26, 2025
概括
这项研究介绍了通过水热硫化合成的超小S-化VMnMo基集群 (s-VMnMoSx). 这些先进的催化剂表现出异常的双功能氧和进化反应活性,用于绿色生产.
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:
- 电化学分水对于绿色生产至关重要.
- 开发高效的阳极 (氧进化反应,OER) 和阴极 (进化反应,HER) 催化剂是必不可少的.
研究的目的:
- 为增强双功能OER/HER活动合成和表征超小型S-dopedVMnMo基集群催化剂 (s-VMnMoSx).
- 为了研究催化剂颗粒大小对OER/HER性能的影响.
主要方法:
- 聚氧甲酸盐的水热硫化,以创建S-doped VMnMo-based集群 (s-VMnMoSx). 聚氧甲酸盐的水热硫化,以创建基于S-doped VMnMo的集群 (s-VMnMoSx).
- 对OER和HER活性进行电化学测试,包括用于整体水分裂的超电位和电池电压.
- 实验和理论计算以阐明活性站点和能源障碍.
主要成果:
- s-VMnMoSx催化剂在500 mA cm-2.2时显示出OER (290 mV) 和HER (181 mV) 的超低超电位.
- 实现了1.72V的低电池电压,用于在500 mA cm-2的整体水分离,在1000小时内可忽略不计的停电.
- 大颗粒尺寸催化剂 (l-VMnMoSx) 的性能不佳,表明超小集群尺寸的关键作用.
结论:
- 超小型s-VMnMoSx催化剂与较大的同行相比,具有优越的双功能OER/HER性能.
- 调整催化剂大小到集群模式改变了活性站点 (V为OER,Mo为HER) 并降低了能量障碍,从而提高了催化效率.
- 这项工作突出了基于VMnMo的大小控制的S-doped集群的潜力,以实现高效的绿色生产.
更多相关视频
10:15Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
Published on: November 7, 2025
376
13:56Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
8.0K
相关概念视频
Voltaic/Galvanic Cells
62.8K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
62.8K
Chemiosmosis
111.1K
Oxidative phosphorylation is a highly efficient process that generates large amounts of adenosine triphosphate (ATP), the basic unit of energy that drives many cellular processes. Oxidative phosphorylation involves two processes— the electron transport chain and chemiosmosis.
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
Electron Transport Chain
The electron transport chain involves a series of protein complexes on the inner mitochondrial membrane that undergo a series of redox reactions. At the end of this chain, the electrons...
111.1K
Chemiosmosis and ATP Synthesis
1.7K
The electron transport chain is a critical component of cellular respiration, occurring in the inner mitochondrial membrane. It facilitates the transfer of high-energy electrons from reduced cofactors NADH and FADH₂ to molecular oxygen, the final electron acceptor. This transfer of electrons through a series of protein complexes is tightly coupled to the translocation of protons across the membrane, generating a proton gradient essential for ATP synthesis.Electron Flow and Proton...
1.7K
Thermal and Photochemical Electrocyclic Reactions: Overview
2.9K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.9K
Metal-Semiconductor Junctions
861
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
861
