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

Leveling Effect01:29

Leveling Effect

1.5K
In acid-base chemistry, the leveling effect refers to the limitation imposed by the solvent on the strength of acids and bases in solution. When a base stronger than the solvent's conjugate base is used, it deprotonates the solvent until the base is entirely consumed, making it ineffective against weaker acids. Conversely, an acid stronger than the solvent's conjugate acid protonates the solvent until the acid is depleted, rendering it ineffective against weaker bases. Essentially, the...
1.5K
Polyprotic Acids03:38

Polyprotic Acids

32.5K
Acids are classified by the number of protons per molecule that they can give up in a reaction. Acids such as HCl, HNO3, and HCN that contain one ionizable hydrogen atom in each molecule are called monoprotic acids. Their reactions with water are:
32.5K
Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration02:40

Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration

11.2K
Introduction
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.
11.2K
Titration of Polyprotic Base with a Strong Acid01:18

Titration of Polyprotic Base with a Strong Acid

6.1K
The titration of a polyprotic base such as sodium carbonate with a strong acid such as hydrochloric acid results in two equivalence points on the titration curve. At the first equivalence point, the carbonate ions in the base are completely converted to bicarbonate ions. The second equivalence point corresponds to the complete conversion of bicarbonate ions to carbonic acid, which dissociates into carbon dioxide and water. The region before the first equivalence point corresponds to the...
6.1K
Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

37.0K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
37.0K
Ion Exchange01:17

Ion Exchange

1.4K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.4K

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

Synthetic Porous Carbons for High-Energy, High-Power Supercapacitors.

Chemical reviews·2026
Same author

Toward Hydrogen Isotope Separations through Strong Hydrogen Adsorption at Open Copper(I) Sites in an Ultramicroporous Metal-Organic Framework.

Journal of the American Chemical Society·2026
Same author

High-Energy-Facet-Oriented Mesoporous Single-Crystal Metal Oxides for Selective Oxidation Catalysis.

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

Cyclodextrin-Derived Porous Liquids Enabled by In Situ Solvation Shell Formation.

Journal of the American Chemical Society·2026
Same author

Magnetic Anisotropy in the Homoleptic [CoX<sub>4</sub>]<sup>2-</sup> (X = Cl, Br, I) Series: Spectroscopic Determination and Ligand Field Studies.

Inorganic chemistry·2026
Same author

Thermal Regulation of CO<sub>2</sub> Activation Pathways via Interfacial Water Restructuring Enables Ampere-Level, Near-Unity CO Electrosynthesis.

Journal of the American Chemical Society·2026

相关实验视频

Updated: Mar 7, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
11:14

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

13.0K

从散装性中解离以化物限制的化质子,以获得高效的进化.

Tian Ke1,2, Qingju Wang2, Kevin Siniard2

  • 1Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.

Journal of the American Chemical Society
|March 6, 2026
PubMed
概括

这项研究在性溶液中创建局部酸性条件,使用化物来增强演化反应 (HER). 这一突破提升了催化剂的性能,从而实现了高效的能量转换.

更多相关视频

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
06:32

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

20.4K
Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

1.1K

相关实验视频

Last Updated: Mar 7, 2026

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
11:14

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

Published on: February 21, 2017

13.0K
A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
06:32

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

20.4K
Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

1.1K

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:

  • 性介质中的质子稀缺性阻碍了像演化反应 (HER) 这样的质子合反应.
  • 开发高效的HER催化剂对于可持续能源技术至关重要.

研究的目的:

  • 在性溶液中设计一个局限的酸性微环境.
  • 为了提高像HER这样的反应的质子可用性.
  • 为高效的能源转换开发先进的催化剂.

主要方法:

  • 利用超微多孔的Bronsted酸性热石来通过大小排除稳定水合质子.
  • 用于现场扩散反射率红外里叶变换光谱学和第一原则模拟.
  • 应用了不弹性中子散射和固态核磁共振来确认.

主要成果:

  • 在性介质中证明了水合质子的稳定和运输.
  • 开发了一种复合催化剂,显示出19-25%的超电位降低.
  • 与商业Pt / C相比,实现了Pt质量活动的20倍增强和加速运动.

结论:

  • 建立了将局部质子活动与散装pH脱的框架.
  • 在性环境中为HER和其他质子合反应开辟了新的途径.
  • 展示了受限酸性微环境在催化作用中的潜力.