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

Electrochemistry: Overview01:04

Electrochemistry: Overview

2.1K
Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
2.1K
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

291
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
291
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

218
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
218
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.4K
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.
2.4K
Standard Electrode Potentials03:02

Standard Electrode Potentials

44.4K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
44.4K
Ladder Diagrams: Redox Equilibria01:30

Ladder Diagrams: Redox Equilibria

487
Ladder diagrams are useful tools for understanding redox equilibrium reactions, especially the effects of concentration changes on the electrochemical potential of the reaction. The vertical axis in the redox ladder diagrams represents the electrochemical potential, E. The area of predominance is demarcated using the Nernst equation.
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
487

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

TRIM65 accelerates VSMC-derived foam cell formation and arteriosclerosis progression by inhibiting mitophagy.

Molecular and cellular biochemistry·2026
Same author

Association Between Gensini Score and Left Ventricular Thrombus in Patients With Acute ST-Segment Elevation Myocardial Infarction.

Reviews in cardiovascular medicine·2026
Same author

Dynamic Lactate Level: An Effective Predictor of Short-Term Mortality After Type A Aortic Dissection Surgery.

Reviews in cardiovascular medicine·2026
Same author

Preparation of pea protein-chitosan composite film based on ultrasonic treatment and application to preserve perishable products.

Food chemistry·2026
Same author

Suggestive associations between genetically predicted gut microbiota and endometriosis: a two-sample Mendelian randomization study.

Journal of medical microbiology·2026
Same author

Hydrothermal dynamics evolution of dry-hot valleys under multiple impacts.

Journal of environmental management·2026

相关实验视频

Updated: Jul 28, 2025

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
10:44

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

721

增强的电化学CO的使用.

Tong Yao1, Lu-Hua Zhang1, Jiayu Zhan1

  • 1National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China. luhuazhang@hebut.edu.cn.

Chemical communications (Cambridge, England)
|June 5, 2023
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的混合催化剂,将石墨烯量子点 (GQDs) 和甲 (CoPc) 结合起来,以有效的电化学 CO2 减少,实现高选择性 CO 形成.

更多相关视频

Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope AFM-SECM
08:31

Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope AFM-SECM

Published on: February 10, 2021

6.9K
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

18.3K

相关实验视频

Last Updated: Jul 28, 2025

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
10:44

Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

721
Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope AFM-SECM
08:31

Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope AFM-SECM

Published on: February 10, 2021

6.9K
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

18.3K

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
  • 纳米技术纳米技术

背景情况:

  • 电化学减少二氧化碳 (CO2) 是可持续能源和化学生产的一个有希望的途径.
  • 开发高效和选择性的催化剂对于推进二氧化碳电还原技术至关重要.
  • 石墨烯量子点 (GQD) 为催化剂的功能和支持提供了独特的特性.

研究的目的:

  • 设计和合成新的混合协调配置,以提高电化学二氧化碳的减少.
  • 为了研究功能化GQD与甲酸 (CoPc) 结合的催化性能.
  • 探索量子点分子工程在催化剂开发中的潜力.

主要方法:

  • 通过将功能化的石墨烯量子点 (例如,功能化的-NH2或-OH) 与CoPc结合起来,制造混合催化剂.
  • 为减少二氧化碳合成的催化剂的电化学表征.
  • 催化性能的评估,包括法拉达效率 (FE) 和潜在范围.

主要成果:

  • CoPc/NH2-GQDs混合催化剂在 -0.8到 -0.9V与RHE之间的电位下实现了100%的CO形成法拉达效率 (FECO).
  • 在500mV的广泛潜在窗口中保持了高FECO (超过90%).
  • 在GQD上功能组的高密度和-NH2的电子捐赠特性有助于提高性能.

结论:

  • 通过使用功能化的GQD和CoPc来构建混合协调配置的简单策略被成功演示.
  • 开发的CoPc/NH2-GQDs催化剂对电化学CO2转化为CO的转化具有出色的选择性和效率.
  • 这种使用量子点的分子工程方法为催化剂设计提供了一种新的策略,适用于其他电化学反应.