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

Electrodeposition01:08

Electrodeposition

607
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
607
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

56.8K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.8K
Formation of Complex Ions03:45

Formation of Complex Ions

23.4K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.4K
Catalysis02:50

Catalysis

26.7K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
26.7K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

425
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
425
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K

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

Polyaniline Encapsulated Cu Nanowires Steering *CO Adsorption Configuration to Enhance Ethanol Selectivity in CO<sub>2</sub> Electrocatalysis.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Direct Photocatalytic Conversion of Methane to Acetone Through a Synergistic Ta Single-Atom/Ga Lewis Acid Catalyst.

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

Organometallic Frameworks for Efficient Electrocatalytic CO<sub>2</sub> Reduction Reactions.

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

Highly Efficient Tandem Electrosynthesis of Dimethyl Carbonate From CO<sub>2</sub>.

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

Charge-Regulated Pyridinic Nitrogen in Covalent Organic Frameworks for Metal-Free Heterogeneous Photocatalytic C─H Arylation of Pyrroles.

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

Efficient Photocatalytic Synthesis of H<sub>2</sub>O<sub>2</sub> via Spatial Separation Design and Anthraquinone Redox Shuttle in Covalent Organic Frameworks.

Advanced materials (Deerfield Beach, Fla.)·2026

相关实验视频

Updated: Jun 9, 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

18.1K

构建Ag/Cu2O接口,以有效的中性CO2电还原到C2H4.

Zongnan Wei1,2, Wenwen Wang2, Tao Shao2

  • 1Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.

Angewandte Chemie (International ed. in English)
|October 29, 2024
PubMed
概括

这项研究开发了一种优化的白银-铜氧化物 (Ag-Cu2O) 催化剂,用于中性二氧化碳 (CO2) 电还原. 催化剂在工业电流密度下实现了对乙烯 (C2H4) 生产的高选择性,为二氧化碳利用提供了一个有前途的途径.

关键词:
*CO覆盖范围包括:在C2H4生产过程中,电化学二氧化碳减排方法接口催化剂的使用中性电解质是中性的电解质.

更多相关视频

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.2K
Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
10:19

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

11.9K

相关实验视频

Last Updated: Jun 9, 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

18.1K
Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.2K
Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
10:19

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation

Published on: July 18, 2017

11.9K

科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 催化剂是一种催化剂.

背景情况:

  • 中性CO2电还原到多碳 (C2+) 是减排和能源转换的关键策略.
  • 在工业电流密度下实现对乙烯 (C2H4) 等特定产品的高选择性仍然是一个重大挑战,因为C-C合动力学缓慢.

研究的目的:

  • 开发一个优化的界面催化剂,以实现高效和选择性的中性CO2电还原.
  • 研究双金属接口在增强C-C合和产品选择性方面的作用.

主要方法:

  • 银铜氧化物 (Ag-Cu2O) 界面催化剂的制造和优化.
  • 在工业相关的电流密度下,在流电池中评估电化学性能.
  • 现场拉曼光谱和理论计算以阐明反应机制.

主要成果:

  • 优化的Ag-Cu2O催化剂在650 mA cm-2.2时实现了73.6%的C2+法拉第效率 (FE).
  • 乙烯 (FE_C2H4) 的显著高FE为66.0%,在部分电流密度为429.1mA cm-2.2时得到.
  • 在现场的拉曼和理论计算显示,在Ag/Cu2O界面上增强了CO形成和C-C合.

结论:

  • Ag-Cu2O界面催化剂在中性CO2电还原到C2H4.4方面表现出前所未有的性能.
  • 双金属接口在促进CO吸附和促进C-C合方面发挥着至关重要的作用.
  • 这项工作为设计高效转化二氧化碳的先进催化剂提供了基本的见解.