Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.3K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.3K
Acid Halides to Ketones: Gilman Reagent01:14

Acid Halides to Ketones: Gilman Reagent

2.9K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
2.9K
Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives01:18

Preparation of Aldehydes and Ketones from Carboxylic Acid Derivatives

2.6K
Aldehydes are more reactive than carboxylic acids and hence, can get over-reduced to alcohol in the presence of strong reducing agents. Therefore, carboxylic acids are inefficient in preparing aldehydes using LAH.
Carboxylic acid derivatives like acid chlorides and esters are more easily reducible than the corresponding acids. The derivatives reduce in the presence of mild reducing agents to give aldehydes. Aldehydes can also be prepared by Rosenmund reduction, that is, the reduction of...
2.6K
Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene01:11

Electrophilic Aromatic Substitution: Friedel–Crafts Acylation of Benzene

7.1K
The Friedel–Crafts acylation reactions involve the addition of an acyl group to an aromatic ring. These reactions proceed via electrophilic aromatic substitution by employing an acyl chloride and a Lewis acid catalyst such as aluminum chloride to form aryl ketone.
7.1K
Preparation of Carboxylic Acids: Carboxylation of Grignard Reagents01:13

Preparation of Carboxylic Acids: Carboxylation of Grignard Reagents

4.6K
Carboxylic acids can be prepared by the carboxylation of Grignard reagents (RMgX). This method is convenient for converting alkyl (primary, secondary or tertiary), vinyl, benzyl, and aryl halides to carboxylic acids with one additional carbon than the starting RMgX.
4.6K
Acid Halides to Carboxylic Acids: Hydrolysis01:01

Acid Halides to Carboxylic Acids: Hydrolysis

2.7K
Hydrolysis of acid halides is a nucleophilic acyl substitution reaction in which acid halides react with water to give carboxylic acids. The reaction occurs readily and does not require acid or a base catalyst.
As shown below, the mechanism involves a nucleophilic attack by water at the carbonyl carbon to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen π bond along with the departure of a halide ion. A final proton transfer step yields carboxylic...
2.7K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Fe-Co-Ni Ternary Single-Atom Catalysts for Efficient Electrochemical Nitrate Reduction.

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

Charge symmetry breaking stabilizes high-valence Ru sites for proton exchange membrane electrolysis.

Nature communications·2026
Same author

Proton-electron temporal asynchrony on femtosecond timescales enables anti-corrosive low-iridium anodes for PEM electrolysers.

Nature nanotechnology·2026
Same author

Fluorine Mediates the Deprotonation Pathway over Ruthenium Oxide for Stable Water Electrolysis.

Journal of the American Chemical Society·2026
Same author

Plasmonic Enhancement in an Earth-Abundant CuNi Catalyst for Alkaline Hydrogen Evolution Reaction.

Journal of the American Chemical Society·2026
Same author

Isolated Lewis Acid Site Enables Electrocatalytic Chlorine Evolution at Low-concentration Chloride Electrolyte.

ACS nano·2026

関連する実験動画

Updated: Jul 12, 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

18.2K

効率的なCOからアセテットへの電還元触媒の先駆体としてのゲルハーディット

Zhi-Zheng Wu1, Xiao-Long Zhang1, Peng-Peng Yang1

  • 1Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.

Journal of the American Chemical Society
|October 26, 2023
PubMed
まとめ

研究者らは,強化された炭素-炭素結合電気化学のために,レーザーで合成されたゲルハルトライトを使用して,新しい銅触媒を開発しました. この欠陥に富んだ触媒は,一酸化炭素の電還元によるアセテート生成の選択性を著しく改善します.

さらに関連する動画

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.5K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.6K

関連する実験動画

Last Updated: Jul 12, 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

18.2K
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
09:18

Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications

Published on: June 21, 2017

11.5K
Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

3.6K

科学分野:

  • 電気化学
  • 材料科学
  • カタリシス

背景:

  • 従来の銅触媒は,炭素-炭素結合電気化学において選択性が低く,単一マルチカーボン (C2+) 化学物質の生成を妨げています.
  • 特定のC2+製品に対して高い選択性を達成することは,COの電気還元における重要な課題です.

研究 の 目的:

  • 炭素-炭素結合によるC2+化学物質の選択性を高める銅触媒を開発する.
  • CO電還元における銅触媒の性能に対する構造変更の影響を調査する.

主な方法:

  • 触媒前駆体としてのゲルハーディット (Cu2(OH) 3NO3) のレーザー照射合成.
  • 欠陥が多い銅の触媒を調節条件下で調節する.
  • 触媒の選択性と部分電流密度を評価するための電気化学的CO減少実験.

主要な成果:

  • 合成された銅触媒は,従来の銅 (31 ± 1%) に比べてアセテート選択性が有意に改善されたことを示した.
  • アセテット生産のために222 ± 7mA/cm2の部分電流密度を達成した.
  • 400mA/cm2のフローリアクターで40時間以上持続した683mmolのアセテート生成.

結論:

  • レーザーで合成されたゲルハーディットによって達成される銅触媒の構造的混乱は,CO吸収とC2+選択性を高めるために電子特性を調節する.
  • 銅を含む鉱物相は,単一の望ましいC2+製品に対する選択性の向上した触媒を設計するための有望な経路を提供します.
  • 開発された触媒は,CO電還元による効率的で選択的なアセテート生産の可能性を示しています.