相关实验视频
Updated: May 23, 2025

08:23
Finite Element Modelling of a Cellular Electric Microenvironment
Published on: May 18, 2021
3.3K
层次的NiFeMoO4 预催化剂重建的NiFeOOH阳极,用于高效和持久的离子交换膜水电解
Xin Cui1, Yunxuan Ding1, Tang Tang1
1Center of Artificial Photosynthesis for Solar Fuels and Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou 310030, China.
ACS applied materials & interfaces
|May 8, 2025
概括
工程层次的NiFeOOH (h-NiFeOOH) 催化剂显著提高了离子交换膜水电解 (AEM-WE) 的氧化演化反应 (OER) 动力学. 这一突破使得高效,低成本的生产能够实现,并提高了催化剂的稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 阳离子交换膜水电解 (AEM-WE) 是可持续生产的一个有前途的技术.
- 氧进化反应 (OER) 动力学仍然是一个瓶,限制了AEM-WE.的效率.
- 开发高活性和稳定的OER催化剂对于推进AEM-WE技术至关重要.
研究的目的:
- 为了合成和描述新型的等级NiFeMoO纳米结构作为OER的前催化剂.
- 为了研究重建的分层NiFeOOH (h-NiFeOOH) 催化剂的OER活性和稳定性.
- 用现场技术和理论计算阐明催化机制和Fe在OER过程中的作用.
主要方法:
- 合成纳米微米层次的NiFeMoO预催化剂.
- 将前催化剂重构成分层的NiFeOOH (h-NiFeOOH).
- *在现场* X射线吸收细结构 (XAFS),拉曼光谱,里埃变换红外光谱 (FTIR) 和密度函数理论 (DFT) 的计算.
主要成果:
- h-NiFeOOH表现出了显著的OER活性,具有较低的超电位 (162 mV在10 mA cm-2和245 mV在1000 mA cm-2).
- 催化剂表现出极好的稳定性,超过1000小时在1000mA cm-2在1.0M KOH.
- 在AEM-WE中,h-NiFeOOH在1.55V (80°C) 维持了1000mA cm-2超过160小时,并在室温下表现出可靠的性能超过1000小时.
结论:
- 设计的h-NiFeOOH催化剂显著提高了AEM-WE的OER动力学和稳定性.
- OER机制涉及Ni位点的吸附演化机制 (AEM),Fe3+充当促进Ni价值的易斯酸.
- 预催化剂工程对于开发高效的基于NiFe的OER催化剂至关重要,突出了Fe在催化循环中的关键作用.
相关概念视频
Levels of Organization
122.1K
Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
122.1K
Maslow's Need Hierarchy Theory
161
Abraham Maslow's theory of motivation, introduced in 1943, is widely known as the "Hierarchy of Needs." This theory posits that human needs are arranged in a hierarchical structure, starting with basic survival needs and progressing toward more complex psychological and self-fulfillment desires. The hierarchy is typically a pyramid, and the lower needs must be satisfied to reach the next level.
At the pyramid's base are physiological needs, including food, water, and shelter...
At the pyramid's base are physiological needs, including food, water, and shelter...
161
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
38
Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
38
Hierarchy of Motor Control
2.4K
The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
2.4K
Taxonomy
73.1K
Taxonomy is the science of defining and naming groups of biological organisms based on shared characteristics. It uses a hierarchy of increasingly inclusive categories with Latin names. The smallest units of taxonomy, species and genus, are used to assign a formal, taxonomic name to each species in a system. This classification system, referred to as binomial nomenclature, was formalized by Carolus Linnaeus in the 18th century.
Hierarchy of Taxonomy
The hierarchy that Carolus Linnaeus first...
Hierarchy of Taxonomy
The hierarchy that Carolus Linnaeus first...
73.1K
Inheritance
322
Gregor Mendel's pioneering work on the principles of inheritance fundamentally transformed our understanding of how traits are transmitted from generation to generation. His experiments with pea plants laid the groundwork for the discovery of genes, discrete units within organisms that control heredity.
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
Each gene exists in pairs, and the combination of these genes from both parents forms an individual's genotype. This genotype is a blueprint of potential traits. Examples of genotype...
322

