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関連する概念動画

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

802
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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関連する実験動画

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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エタノール酸化反応のためのパラジウム系多元素ナノ粒子

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
まとめ

コロイド法を用いて燃料電池における効率的なアルコール酸化のための新しいパラジウム合金ナノ触媒を開発した。三元パラジウム金銀（PdAuAg）ナノ粒子は、市販の触媒と比較して優れた活性と安定性を示す。

科学分野:

  • 材料科学
  • 電気化学
  • ナノテクノロジー

背景:

  • 高効率で安定した触媒は、高性能燃料電池に不可欠である。
  • アルコールの陽極酸化は、燃料電池技術における重要なプロセスである。

研究 の 目的:

  • 新規パラジウム系合金ナノ触媒の合成と特性評価。
  • アルコール酸化における触媒性能の評価。

主な方法:

  • 単元、二元、三元のパラジウム合金ナノ粒子のコロイド合成。
  • 活性および安定性試験を含む電気化学的特性評価。
  • 密度汎関数理論（DFT）計算。

主要な成果:

  • 三元PdAuAgナノ粒子は、単金属Pdおよび市販のPd/CおよびPt/C触媒と比較して、エタノール酸化に対する質量活性と安定性が大幅に向上した。
  • 合金形成は格子膨張を誘発し、表面配位を変化させ、触媒特性を向上させた。
  • DFT計算により、PdAuAgの反応速度論と安定性が向上したことが確認された。

結論:

  • パラジウム合金ナノ触媒、特にPdAuAgは、アルコール酸化のための高度な電気触媒を開発するための有望な戦略を提供する。
キーワード:
パラジウム合金ナノ粒子エタノール酸化反応燃料電池触媒ナノテクノロジー

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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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関連する実験動画

Last Updated: Feb 12, 2026

Ligand-Mediated Nucleation and Growth of Palladium Metal Nanoparticles
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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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  • 合金元素の相乗効果は、活性と耐久性の両方を向上させる。
  • この研究は、高性能な多元素ナノ粒子触媒を設計するための容易なアプローチを提供する。