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

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

9.8K
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.
9.8K
Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

64.2K
Oxidation–Reduction Reactions
64.2K
Redox Reactions01:24

Redox Reactions

55.4K
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...
55.4K
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
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.2K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.2K
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

518
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...
518

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

<i>In vitro</i> transcribed circRNA as a therapeutic agent for cancer.

Acta pharmaceutica Sinica. B·2026
Same author

Immiscible Metal-Regulated Surface Segregation Enables Core-Shell Bi-PtMn Catalysts With Benchmark Performance in Direct Methanol Fuel Cells.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Transient Overcoordination Unlocks C-H Bond Activation in Boron-Based Oxidative Dehydrogenation.

Journal of the American Chemical Society·2026
Same author

Peri-Implant Tissue Stability Following Guided Bone Regeneration With Bioceramic: A Multicenter One-Year Cohort Study.

Clinical implant dentistry and related research·2026
Same author

Soil nutrient stability outperforms microbial abundance stability as an early-warning indicator in a Tibetan alpine meadow under seasonal asymmetric warming.

Journal of environmental management·2026
Same author

Correction: The Dynamics of Soil Organic Carbon in Alpine Grasslands Affected by Livestock Grazing Intensity.

Environmental management·2026

相关实验视频

Updated: Jun 1, 2025

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase
10:14

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase

Published on: November 8, 2019

6.3K

受酶启发的单一位点用于选择性氧气减少.

Peng-Yang Zhang1, Xia Xu1, Wen-Song Yu1

  • 1State Key Laboratory of Physical Chemistry of Solids, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.

Angewandte Chemie (International ed. in English)
|January 20, 2025
PubMed
概括

碳催化剂上的生物模拟单位模仿高选择性氧降解反应 (ORR) 的酶. 这种先进的催化剂设计显著减少过氧化的副产品,提高了催化剂的稳定性和性能.

关键词:
酶模仿催化剂的催化作用氧降解反应是氧降解反应.有反应性氧物种的反应性氧物种.选择性的选择性一个原子的催化剂.

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

8.4K
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.1K

相关实验视频

Last Updated: Jun 1, 2025

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase
10:14

Expression and Purification of Nuclease-Free Oxygen Scavenger Protocatechuate 3,4-Dioxygenase

Published on: November 8, 2019

6.3K
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

8.4K
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.1K

科学领域:

  • 催化剂是一种催化剂.
  • 材料科学 材料科学 材料科学
  • 生物模拟化学 生物模拟化学

背景情况:

  • 灵感来自自然的设计为材料和催化剂开发提供了新的解决方案.
  • 酶在过氧化物代谢和相关反应中起着至关重要的作用.
  • 氧降解反应 (ORR) 选择性对于能源应用至关重要.

研究的目的:

  • 设计一种仿生催化剂,模仿ORR的酶活性.
  • 为了实现高的4电子选择性,并最大限度地减少过氧化的副产品.
  • 提高各种ORR催化剂的选择性和稳定性.

主要方法:

  • 单一 (Se) 站点修改碳 (C) 催化剂的合成.
  • 氧降解反应 (ORR) 性能的电化学表征.
  • 在现场X射线吸收光谱和理论计算.

主要成果:

  • -C催化剂实现了近100%的4电子选择性,H2O2产量最小 (0.039%),比 (Pt) 的性能优于65倍.
  • Se-C表现出类似酶的行为,有效地从过氧化物中间体中清除氧原子.
  • Se-C显著提高了Co-N-C,Fe-N-C和N-C催化剂的2+2电子选择性,降低了H2O2产量高达98%.

结论:

  • 单个Se站点的生物仿真设计为调整ORR选择性提供了一个强大的策略.
  • 基位的类似酶的活性通过防止氧化降解来增强催化剂的稳定性.
  • 这种方法为ORR和其他反应设计高度选择性的催化剂开辟了新的途径.