Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Redox Equilibria: Overview01:23

Redox Equilibria: Overview

522
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
522
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.6K
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...
20.6K
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

6.1K
Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...
6.1K
Redox Titration: Other Oxidizing and Reducing Agents01:26

Redox Titration: Other Oxidizing and Reducing Agents

240
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
240
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

64.3K
Oxidation–Reduction Reactions
64.3K
Redox Reactions01:24

Redox Reactions

55.5K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
55.5K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Inherently Conducting Polymeric Materials from Conjugated Polyisoprene-Based Rubbers.

ACS applied materials & interfaces·2026
Same author

Transforming disorder in the design of advanced high-entropy oxide electrocatalysts for zinc-air batteries.

Nature communications·2026
Same author

Thousand-hour salt precipitation-free CO<sub>2</sub>-to-ethylene electrosynthesis at high current densities.

Nature communications·2025
Same author

Copper-stabilized bismuth subcarbonate electrocatalysts for durable large-scale formate production at kilowatt power.

Nature communications·2025
Same author

Recent Developments in Solid-State Electrolytes for Advanced Energy Storage Devices.

ACS nano·2025
Same author

Carbon catalysts for CO<sub>2</sub> conversion: From carbon emissions to zero-carbon solutions.

Science advances·2025

相关实验视频

Updated: Jun 5, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.7K

第二层协调环境调制MnN4活性站点的氧气兴奋剂以提高氧气减少性能.

Xuanni Lin1, Dong Liu1, Lei Shi2

  • 1State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

Small (Weinheim an der Bergstrasse, Germany)
|December 13, 2024
PubMed
概括

单原子催化剂 (SACs) 在其第二协调中使用氧化,显示出增强的氧降解反应 (ORR) 活性和稳定性. 这一突破为能源应用提供了一个有前途的非贵金属替代品.

关键词:
在Zn-空气电池.氧气兴奋剂是指使用氧气兴奋剂.氧减少反应反应的氧减少反应.第二层协调环境调制.稳定的运行稳定的运行.

更多相关视频

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.5K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

1.9K

相关实验视频

Last Updated: Jun 5, 2025

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

7.7K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.5K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

1.9K

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:

  • 基于的单原子催化剂 (SAC) 是氧降解反应 (ORR) 的非贵金属催化剂.
  • 现有的SAC经常表现出不满意的ORR活性,结构-活性关系,特别是关于第二个协调的关系,仍然不清楚.
  • 铁基催化剂虽然活跃,但患有芬顿式活动,/催化剂在地球上不那么丰富.

研究的目的:

  • 通过修改其第二协调来开发ORR的高效和稳定的SAC.
  • 通过研究Mn SACs的第二协调中氧气兴奋剂的影响来阐明结构-活性关系.
  • 评估空气电池 (ZAB) 中开发的催化剂的性能.

主要方法:

  • 在第二个协调 (MnSAC-O/C) 中合成SAC与氧气注.
  • 使用X射线吸收光谱 (XAS) 进行表征,以验证氧气兴奋剂和分析局部协调环境.
  • 对空气电池的ORR性能和长期稳定性的电化学测试.
  • 理论计算 (例如,DFT) 以了解电子结构和反应机制.

主要成果:

  • 在第二个协调中,成功合成了MnSAC-O/C与经过验证的氧气兴奋剂,在Mn中心周围诱导了局部扭曲.
  • MnSAC-O/C表现出优越的ORR活性,半波潜力为0.898V,性能优于未使用过的MnSAC-C,商业Pt/C和其他非贵金属SAC.
  • 基于MnSAC-O/C的ZAB表现出卓越的耐用性,稳定运行超过930小时.
  • 理论计算显示,氧注改变了MnN4活性位点的电荷分布,并促进OH*脱吸.

结论:

  • 在第二个协调中进行氧气兴奋剂是一种有效的策略,可以提高Mn SACs的ORR性能.
  • 经过修改的电子结构和改进的OH*脱吸动力学有助于MnSAC-O/C的优越活性和稳定性.
  • MnSAC-O/C 是一种非常有前途的非贵金属催化剂,用于像ZABs这样的高效和持久的能量转换设备.