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

Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.0K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.0K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K

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

Pulse-Driven Paired Electrosynthesis of Formamide via Redox-Tuned Intermediate Management.

Journal of the American Chemical Society·2026
Same author

Editable Hydrogen Bond Network Within the Electric Double Layer for CO<sub>2</sub> Reduction.

Angewandte Chemie (International ed. in English)·2026
Same author

Direct Electrosynthesis of Glycolate From Carbon Dioxide.

Angewandte Chemie (International ed. in English)·2026
Same author

Brain-Derived Neurotrophic Factor and Associated Signaling in Kidney Diseases.

FASEB journal : official publication of the Federation of American Societies for Experimental Biology·2026
Same author

Multi-Atom Sub-Nanometer Assemblies on Interpenetrating Multi-Chambered N/C Nanospheres.

Angewandte Chemie (International ed. in English)·2026
Same author

ATPIF1, the rheostat in mitochondrial bioenergetics and dysfunction in diseases.

Mitochondrion·2026

相关实验视频

Updated: Jul 11, 2025

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

18.2K

高稳定的分层协调聚合物电催化剂向高效的CO2到CH4转换.

Xiao Chen1,2, Shuaiqiang Jia1,2, Chunjun Chen1,2

  • 1Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, P. R. China.

Advanced materials (Deerfield Beach, Fla.)
|November 17, 2023
PubMed
概括

一个新的CuPEDOT催化剂稳定了铜离子,使得二氧化碳 (CO2) 可选择性降低到甲 (CH4) 高效率和稳定性. 这种分子稳定的催化剂有助于推进二氧化碳转化研究.

关键词:
减少二氧化碳的减少细胞流动的细胞流动.层层的协调聚合物聚合物甲是一种甲.稳定的稳定性 稳定的稳定性

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

3.6K
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.5K

相关实验视频

Last Updated: Jul 11, 2025

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

18.2K
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

3.6K
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.5K

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:

  • 基于铜 (Cu2+) 的材料对二氧化碳电催化减排 (CO2 RR) 是有前途的,但其结构不稳定.
  • 在二氧化碳RR过程中,活性位点的重组会导致催化剂失活,并阻碍了结构性能关系研究.

研究的目的:

  • 开发一种在CO2 RR催化剂中稳定Cu2+离子的策略.
  • 创建一种新型催化剂,防止结构重组,并促进选择性减少二氧化碳到甲 (CH4).

主要方法:

  • 通过协调Cu2+与3,4-乙烯二氧化 (EDOT) 来轻松合成一个分层协调聚合物 (CuPEDOT).
  • 在流电池中的电催化二氧化碳还原反应 (CO2 RR).
  • 在现场进行光谱学表征和理论计算.

主要成果:

  • 在354mA cm-2.2时,CuPEDOT实现了选择性降低CO2到CH4的62.7%法拉第效率.
  • 催化剂的稳定性至少持续了15小时.
  • 在CO2RR期间保持了稳定的Cu2+-EDOT协调,促进了CH4的形成,而不是C2产品.

结论:

  • 强大的Cu2+-EDOT协调可以防止Cu2+的减少,并稳定催化剂结构.
  • 库佩多特为设计分子稳定和高活性CO2RR催化剂提供了一种新方法.
  • 这项工作提供了通过增强CO化来促进CH4选择性的见解.