晶体CoP@无形WP同轴纳米线阵列作为水分化的双功能电催化剂
Xinyue Wei1,2,3, Linyin Huang1,2,3, Yuan Yu1,2
1Materials Institute of Atomic and Molecular Science, School of Physics & Information Science, Shaanxi University of Science and Technology, Xi'an, 710021, China.
Small (Weinheim an der Bergstrasse, Germany)
|March 13, 2025
概括
新的CoP@WP2/NF催化剂在和氧进化反应中表现出卓越的性能. 与传统的基催化剂相比,这些先进的催化剂提供了较低的过度潜力和更低的能耗.
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:
- 开发高效的电催化剂对于能源转换技术至关重要.
- 过渡金属化物 (TMP) 是有前途的,但往往需要进一步优化.
- 核心外纳米结构可以通过协同效应来增强催化活性.
研究的目的:
- 为了合成和描述新的CoP@WP2/NF核心纳米线阵列.
- 评估CoP@WP2/NF对演化反应 (HER) 和氧演化反应 (OER) 的电催化性能.
- 将性能与现有的最先进的催化剂进行比较,包括Pt/C和Ru2O.
主要方法:
- 在Ni泡 (CoP@WP2/NF) 上制造晶体CoP@amorphousWP2核心外纳米线阵列.
- 在酸性和性介质中进行电化学测试,以评估HER和OER活性.
- 使用CoP@WP2/NF电极的分水电池的性能评估.
主要成果:
- 在酸性介质中,CoP@WP2/NF对HER具有非常低的超电位 (13mV在10mA cm-2,97mV在100mA cm-2),其表现优于Pt/C.
- 在性介质中有效的HER性能 (68 mV在10 mA cm-2,136 mV在100 mA cm-2) 和良好的OER活性 (254 mV在10 mA cm-2).
- 使用CoP@WP2/NF的水分裂电池显示电池电压低于Pt/C‖Ru2O (1.52 V),在10 mA cm-2时为1.37 V,在高电流密度下能效提高.
结论:
- CoP@WP2/NF核心外结构提供了增强的活性位点和界面电荷合,从而产生了卓越的催化动力学.
- CoP@WP2/NF是HER和OER的高效和成本效益的电催化剂,适用于水分.
- 这些发现突出了先进的核心纳米结构在开发下一代电催化材料的潜力.
更多相关视频
相关概念视频
Polymer Classification: Crystallinity
2.7K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
2.7K
Structures of Solids
13.6K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
13.6K
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
276
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
276
Crystal Growth: Principles of Crystallization
1.5K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
1.5K
Molecular and Ionic Solids
16.6K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.6K
X-ray Crystallography
23.7K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
23.7K


