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

Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

10.5K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.5K
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

564
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...
564
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

65.0K
Oxidation–Reduction Reactions
65.0K
Regioselectivity of Electrophilic Additions-Peroxide Effect02:35

Regioselectivity of Electrophilic Additions-Peroxide Effect

8.6K
In the presence of organic peroxides, the addition of hydrogen bromide to an alkene yields the isomer that is not predicted by Markovnikov’s rule. For example, the addition of hydrogen bromide to 2-methylpropene in the presence of peroxides gives 1-bromo-2-methylpropane. This addition reaction proceeds via a free radical mechanism, which reverses the regioselectivity. The free radical reaction mechanism involves three stages: initiation, propagation, and termination.
8.6K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.2K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.2K
Oxidation and Reduction of Organic Molecules01:19

Oxidation and Reduction of Organic Molecules

6.6K
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...
6.6K

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

Lysosome self-sorting nanodegraders for hepatic clearance of pathogenic serum mediators.

Nature nanotechnology·2026
Same author

Effects of metal components in PM<sub>2.5</sub> derived from pig farm exposure on ovarian function and oocyte quality.

Journal of hazardous materials·2026
Same author

Epidemiological Trends and Shared Molecular Signatures of Pancreatic Ductal Adenocarcinoma and Diabetes: An Integrative Analysis Based on Global Burden of Disease and Gene Expression Omnibus Datasets.

Journal of Cancer·2026
Same author

Precipitation and plant cover promote soil organic carbon accumulation in the northeastern Qinghai-Tibet Plateau.

AoB PLANTS·2026
Same author

Amide proton transfer-weighted magnetic resonance imaging for predicting histopathology and biomarkers in rectal adenocarcinoma.

Quantitative imaging in medicine and surgery·2026
Same author

Burst-Mode Near-Infrared Chemiluminescent Probes for In Vivo Imaging.

Journal of the American Chemical Society·2026

相关实验视频

Updated: Jul 8, 2025

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

16.0K

调节Ir-O共性以促进酸氧演化反应.

Jiayan Wu1, Wenwu Zou1, Jiaxi Zhang1

  • 1Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.

Small (Weinheim an der Bergstrasse, Germany)
|December 15, 2023
PubMed
概括

将三价金属纳入二氧化 (IrO2) 增加了其氧化演化反应 (OER) 活性,以有效生产. 这种增强源于增加的Ir-O共价性,使网状氧介导机制成为可能.

关键词:
铁O的共价性酸性氧的演化反应反应格子氧化机制的格子氧化机制三价金属替代品的三价金属替代品

更多相关视频

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
08:31

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Published on: October 3, 2018

8.5K
Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
12:08

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry

Published on: March 18, 2012

15.2K

相关实验视频

Last Updated: Jul 8, 2025

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

16.0K
Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition
08:31

Anaerobic Protein Purification and Kinetic Analysis via Oxygen Electrode for Studying DesB Dioxygenase Activity and Inhibition

Published on: October 3, 2018

8.5K
Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry
12:08

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry

Published on: March 18, 2012

15.2K

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:

  • 氧化演化反应 (OER) 对于通过水电解产生至关重要.
  • 二氧化 (IrO2) 是一个关键的电催化剂,但它的活性和成本仍然是挑战.
  • 质子交换膜水电解器需要高度活跃和稳定的OER电催化剂.

研究的目的:

  • 为了增强鲁 IrO2.2 的酸性OER活性.
  • 为了研究金属合并对Ir-O共价性和OER性能的影响.
  • 制定一项改善用于水分的基于Iro2的电催化剂的战略.

主要方法:

  • 将三价金属 (Gd,Nd,Pr) 纳入IrO2网格中.
  • 合成材料的实验性表征.
  • 理论分析包括密度函数理论 (DFT) 计算.
  • 在酸性介质中对OER活性和稳定性的电化学测试.

主要成果:

  • 三价金属的合并显著提高了IrO2的OER活动,增加了Ir-O共价性.
  • 高价值金属的加入降低了Ir-O共价性,导致了较差的OER性能.
  • 观察到内在活性和Ir-O共价性之间存在线性关系.
  • Gd-IrO2-δ在10 mA cm-2时实现了260 mV的超电位,具有200小时的稳定性.

结论:

  • 调节Ir-O共价是一种有效的策略,可以促进IrO2电催化剂中的OER活性.
  • 增强的Ir-O共值激活了晶格氧,促进了晶格氧介导的OER机制.
  • 这种方法提供了一种降低生产成本和能源消耗的途径.