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

Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

10.2K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
10.2K
Catalysis02:50

Catalysis

26.8K
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.
26.8K
Carboxylic Acids to Methylesters: Alkylation using Diazomethane01:33

Carboxylic Acids to Methylesters: Alkylation using Diazomethane

2.1K
Carboxylic acids react with diazomethane in an ether solvent via alkylation at the carboxylate oxygen atom to give methyl esters of the corresponding acid with excellent yields.
2.1K
Oxymercuration-Reduction of Alkenes02:36

Oxymercuration-Reduction of Alkenes

7.5K
Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.
7.5K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

11.3K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.3K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.0K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.0K

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

Unveiling the Role of Hydroxyls on Catalyst Surface in CO<sub>2</sub> Hydrogenation Reaction.

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

Hydrosilylation of ω-hydroxyalkenes catalysed with 2-methacryloyloxyethyl-phosphorylcholine-protected ruthenium nanoparticles.

Chemical communications (Cambridge, England)·2026
Same author

Interfacial Ru-C Coupling Harnesses Photoexcited Hot Electrons to Sustain Oxygen Cycling in Photothermal Methane Dry Reforming.

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

Shrub and forest proximity and cattle farming drive tick (Acari: Ixodidae) exposure risk in the SFTS endemic region of Chongqing, China.

Journal of medical entomology·2026
Same author

Brønsted acid sites in zeolites activate ozone to generate reactive oxygen species for CO oxidation.

Nature communications·2026
Same author

Machine-Learning-Guided Discovery of CH<sub>4</sub> Combustion Catalysts Operating in the Presence of SO<sub>2</sub>.

Journal of the American Chemical Society·2026

関連する実験動画

Updated: Jun 20, 2025

Combustion Chemistry of Fuels: Quantitative Speciation Data Obtained from an Atmospheric High-temperature Flow Reactor with Coupled Molecular-beam Mass Spectrometer
07:24

Combustion Chemistry of Fuels: Quantitative Speciation Data Obtained from an Atmospheric High-temperature Flow Reactor with Coupled Molecular-beam Mass Spectrometer

Published on: February 19, 2018

10.1K

低温メタン燃焼用オゾンによるCOβ触媒

Shunsaku Yasumura1, Ken Nagai2, Shinta Miyazaki2

  • 1Institute of Industrial Science, The University of Tokyo, Komaba 4-6-1, Meguro, Tokyo 153-8505, Japan.

Journal of the American Chemical Society
|July 20, 2024
PubMed
まとめ
この要約は機械生成です。

同交換されたβゼオライト (Coβ) は,オゾンを使用して低温でメタンの燃焼を効率的に触媒化する. 単離されたCO2+種は,理論的な計算によって解明された反応機構を持つ活性部位として識別されます.

さらに関連する動画

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
08:15

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

Published on: February 7, 2017

11.4K
CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
07:08

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

Published on: June 12, 2019

6.8K

関連する実験動画

Last Updated: Jun 20, 2025

Combustion Chemistry of Fuels: Quantitative Speciation Data Obtained from an Atmospheric High-temperature Flow Reactor with Coupled Molecular-beam Mass Spectrometer
07:24

Combustion Chemistry of Fuels: Quantitative Speciation Data Obtained from an Atmospheric High-temperature Flow Reactor with Coupled Molecular-beam Mass Spectrometer

Published on: February 19, 2018

10.1K
Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
08:15

Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts

Published on: February 7, 2017

11.4K
CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
07:08

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light

Published on: June 12, 2019

6.8K

科学分野:

  • キャタリシス
  • 材料科学
  • 環境化学

背景:

  • 未燃焼のメタン (CH4) の排出は温室効果ガスを生み出しています.
  • 触媒燃焼はCH4の放出を緩和する重要な戦略です.
  • オゾン (O3) アクティベーションは,低温メタン酸化のための新しい経路を提供します.

研究 の 目的:

  • 低温メタンの燃焼のための効率的な触媒を開発する.
  • メタン酸化の活性部位と反応機構を特定する.
  • 様々な条件下で触媒の安定性と性能を評価する.

主な方法:

  • イオン交換 βゼオライト (Co,Ni,Mn,Fe,Pd) の合成と特徴づけ
  • オゾンを使ったメタンの燃焼に対する触媒活性試験
  • 活性種を特定するためのX線吸収スペクトロスコーピー (XAS).
  • 単一構成要素の人工力誘発反応 (SC-AFIR) の計算により,メカニズムが解明される.

主要な成果:

  • 同交換されたβゼオライト (Coβ) は100°C以下で優れた性能を示した.
  • 単離されたCO2+種が主な活性部位として特定されました.
  • 理論的な計算により,活性化エネルギー73kJ/molの反応経路が明らかになった.
  • H2OとCOの存在で触媒の活性が低下したが,脱水後に回復した.

結論:

  • βゼオライトの分離されたCO2+は,低温メタンとオゾンとの燃焼の効果的な触媒である.
  • 反応は理論的な計算で裏付けられたメカニズムで進みます
  • 触媒は水と一酸化炭素に敏感ですが,安定性と再生性が良好です.