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相关概念视频

Oxidation-Reduction Reactions03:11

Oxidation-Reduction Reactions

75.8K
Oxidation–Reduction Reactions
75.8K
Phase I Oxidative Reactions: Overview01:19

Phase I Oxidative Reactions: Overview

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Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
802
Acids, Bases and Neutralization Reactions03:26

Acids, Bases and Neutralization Reactions

63.9K
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
63.9K
Oxidation Numbers03:14

Oxidation Numbers

43.1K
In redox reactions, the transfer of electrons occurs between reacting species. Electron transfer is described by a hypothetical number called the oxidation number (or oxidation state). It represents the effective charge of an atom or element, which is assigned using a set of rules.
43.1K
Reactions at the Benzylic Position: Oxidation and Reduction00:59

Reactions at the Benzylic Position: Oxidation and Reduction

5.1K
The benzylic position describes the position of a carbon atom attached directly to a benzene ring. Benzene by itself does not undergo oxidation. In contrast, the benzylic carbon is quite reactive in the presence of strong oxidizing agents such as KMnO4 or H2CrO4. Therefore, alkylbenzenes are readily oxidized to benzoic acid, irrespective of the type of alkyl groups.
5.1K
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation01:22

Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation

5.1K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is activated by...
5.1K

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相关实验视频

Updated: Feb 12, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
11:54

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles

Published on: June 25, 2018

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基于的多元素纳米粒子用于乙醇氧化反应.

Xiaoyu Hou1, Shiqi Yang1, Xianzhuo Lao1

  • 1College of Smart Materials and Future Energy, Fudan University, Shanghai 200438, China. pcchen@fudan.edu.cn.

Nanoscale
|February 11, 2026
PubMed
概括

我们使用合金方法开发了新的合金纳米催化剂,用于燃料电池中高效的酒精氧化. 与商业催化剂相比,三元金银 (PdAuAg) 纳米颗粒显示出更高的活性和稳定性.

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:

  • 高效和稳定的催化剂对于高性能燃料电池至关重要.
  • 酒精的阳极氧化是燃料电池技术中的一个关键过程.

研究的目的:

  • 合成和描述基于的新型合金纳米催化剂.
  • 评估它们在酒精的电催化氧化中的性能.

主要方法:

  • 单元,二元和三元合金纳米粒子的合合成.
  • 电化学表征包括活性和稳定性测试.
  • 密度函数理论 (DFT) 的计算.

主要成果:

  • 与单金属 Pd 和商业 Pd/C 和 Pt/C 催化剂相比,三级 PdAuAg 纳米颗粒显示出明显更高的质量活性和稳定性以乙醇氧化.
  • 合金形成诱导了晶格扩张和改变了表面协调,从而提高了催化性能.
  • DFT计算证实了PdAuAg的反应动力学和稳定性得到改善.

结论:

  • 合金纳米催化剂,特别是PdAuAg,为开发用于酒精氧化的先进电催化剂提供了一个有希望的战略.

更多相关视频

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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

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相关实验视频

Last Updated: Feb 12, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination

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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate
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Manganese Oxide Nanoparticle Synthesis by Thermal Decomposition of ManganeseII Acetylacetonate

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  • 合金元素的协同作用提高了活性和耐用性.
  • 这项工作为设计高性能多元素纳米粒子催化剂提供了一个简单的方法.