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

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.8K
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...
3.8K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration02:34

Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration

9.5K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
9.5K
Prochirality02:05

Prochirality

4.8K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
4.8K
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation02:24

Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

8.9K
Introduction
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
8.9K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

13.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.9K
Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

17.9K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
17.9K

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

Targeting STAT3-mediated lipid metabolism reprogramming overcomes chemoresistance in acute myeloid leukemia.

Cell death & disease·2026
Same author

Integrative multi-omics analysis identifies SNRPE as a key driver gene in uterine corpus endometrial carcinoma: promoting tumor progression, and mediating immune evasion.

Frontiers in immunology·2026
Same author

Machine Learning-Based Accurate Full-Sib Family Assignment in Sturgeon Using Whole-Genome Sequencing Data.

International journal of molecular sciences·2026
Same author

Natural product-induced apoptosis in oral squamous cell carcinoma via targeting mitochondrial multifunctionality.

Frontiers in oncology·2026
Same author

Author Correction: Coordination-tailored atomic interfaces for selective CH<sub>4</sub>-to-C<sub>2</sub> conversion in aqueous solution.

Nature communications·2026
Same author

ACAT1-mediated lactylation reprogramming governs immune-stromal crosstalk in ulcerative colitis.

International immunopharmacology·2026
Same journal

Sub1 contributes to heart failure with preserved ejection fraction driven by aging in mice.

Nature communications·2026
Same journal

The BRCA1-A complex restricts replication fork reversal-dependent DNA repair in ATM deficient cells.

Nature communications·2026
Same journal

Signaling downstream of tumor-stroma interaction regulates mucinous colorectal adenocarcinoma apicobasal polarity.

Nature communications·2026
Same journal

Click-polymerized polyenamine membranes for efficient lithium extraction.

Nature communications·2026
Same journal

Joint trajectories of brain atrophy, white matter hyperintensities and cognition quantify brain maintenance.

Nature communications·2026
Same journal

Proton shuttling at electrochemical interfaces under alkaline hydrogen evolution.

Nature communications·2026
查看所有相关文章

相关实验视频

Updated: Jan 15, 2026

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

19.0K

在水溶液中进行选择性CH4-to-C2转换的协调定制的原子接口.

Fanle Bu1, Jiayu Yan1, Lu Qi1

  • 1Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, PR China.

Nature communications
|October 15, 2025
PubMed
概括
此摘要是机器生成的。

这项研究在碳化物气凝上引入了Fe二原子催化剂,用于在温和条件下选择性氧化甲到酸. 新的Fe-O2-Fe接口实现了高选择性和生产率,为工业应用铺平了道路.

更多相关视频

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
10:39

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

Published on: August 23, 2018

8.3K
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.4K

相关实验视频

Last Updated: Jan 15, 2026

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

19.0K
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
10:39

Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction

Published on: August 23, 2018

8.3K
Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy
07:36

Versatile CO2 Transformations into Complex Products: A One-pot Two-step Strategy

Published on: November 9, 2019

8.4K

科学领域:

  • 催化科学是一种催化科学.
  • 材料科学是一种材料科学.
  • 绿色化学是一种绿色化学.

背景情况:

  • 选择性甲氧化成有价值的化学物质是一个重大挑战.
  • 为了能源效率和可持续性,需要温和的反应条件.
  • 双原子催化剂为化学转换提供了独特的活性场所.

研究的目的:

  • 开发和描述具有O2桥接铁二原子接口的Fe双原子催化剂 (Fe-DAC/g-C3N4).
  • 在温和条件下研究选择性甲氧化成乙酸的机制.
  • 在甲转化中实现高性能和选择性.

主要方法:

  • 在碳化物气凝上支持Fe双原子催化剂的合成.
  • 使用先进技术对Fe-O2-Fe接口进行表征.
  • 对甲氧化反应动力学和机制的实验研究.
  • 在环境和工业相关压力下的性能评估.

主要成果:

  • 成功构建了Fe-O2-Fe二原子接口,具有精确的Fe-Fe距离 (2.92 ± 0.05 Å).
  • 在温和条件下实现近100%的选择性用于酸生产.
  • 在环境条件下证明了0.79 mmol gcat-1 h-1的CH3COOH生产率.
  • 在1.5 MPa CH4下观察到1.67 mmol gcat-1 h-1 的生产率,具有>96%的选择性.

结论:

  • 通过O2桥接的Fe二原子接口对于激活甲C-H键至关重要.
  • 一个涉及激素中间体和C-C合的协调机制导致选择性酸的形成.
  • 开发的Fe-DAC/g-C3N4催化剂在工业甲价值化方面表现出卓越的性能.