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

Catalysis02:50

Catalysis

30.1K
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.
30.1K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

10.4K
For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
10.4K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

3.3K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this species into...
3.3K
Radical Reactivity: Overview01:11

Radical Reactivity: Overview

2.6K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.6K
Coupled Reactions01:17

Coupled Reactions

10.5K
Cellular processes such as building and breaking down complex molecules occur through stepwise chemical reactions. Some of these chemical reactions are spontaneous and release energy, whereas others require energy to proceed. Cells often couple the energy-releasing reaction with the energy-requiring one to carry out important cell functions. 
Energy in adenosine triphosphate or ATP molecules is easily accessible to do work. ATP powers the majority of energy-requiring cellular reactions....
10.5K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

13.9K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
13.9K

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

Gas-Solid van der Waals Interaction Driving the Dynamic Evolution of Surface Nanostructures.

Journal of the American Chemical Society·2026
Same author

Ru Nanowires for Effective Low-Temperature CO<sub>2</sub> Methanation in the Aqueous Phase.

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

Orchestrating structure and chemistry dynamics for cluster catalysis.

National science review·2026
Same author

Strong Metal-Metal Interaction-Induced Encapsulation of Cobalt by Lanthanum Nitride for Efficient Ammonia Synthesis.

Journal of the American Chemical Society·2026
Same author

[Effect of acupuncture at Jiaji on F-wave and clinical efficacy in stroke patients with upper limb spasticity on the hemiplegic side].

Zhen ci yan jiu = Acupuncture research·2026
Same author

Electron-Rich Subnanometer Cu Clusters Facilitate CO-CO Coupling in CO<sub>2</sub> Electroreduction.

Journal of the American Chemical Society·2026
Same journal

Gas-Responsive Metal-Organic Frameworks for Adaptive Thermal Energy Storage with Tunable Charge-Discharge Temperatures.

Journal of the American Chemical Society·2026
Same journal

Engineering a Thiamine-Dependent Benzoylformate Decarboxylase for Stereodivergent Radical C(sp<sup>3</sup>)-C(sp<sup>3</sup>) Bond Formation.

Journal of the American Chemical Society·2026
Same journal

Accelerated Directional Proton-Coupled Electron Transfer Enabled by Intrinsic Dipole Field in Biomimetic α-Helical Structure.

Journal of the American Chemical Society·2026
Same journal

Alternating Current-Driven Hydrogen Isotope Labeling of Aliphatic Amines Using 1,3-Propanedithiol as an Efficient Hydrogen Atom Transfer Reagent.

Journal of the American Chemical Society·2026
Same journal

Two-Dimensional van der Waals Polar Metal MoOBr<sub>2</sub>.

Journal of the American Chemical Society·2026
Same journal

Negatively Curved Chiral Bilayer Nanographene.

Journal of the American Chemical Society·2026
関連記事をすべて見る

関連する実験動画

Updated: Jan 12, 2026

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
07:53

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry

Published on: March 1, 2020

7.8K

表面と地下の結合ダイナミクスによるクラスター触媒

Hong-Yue Wang1, Jia-Lan Chen1, Xin-Ze Qi1

  • 1State Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, Anhui, China.

Journal of the American Chemical Society
|November 5, 2025
PubMed
まとめ
この要約は機械生成です。

機械学習は 反応中に触媒の表面が どのように再構成され 活性金属のクラスターを形成するかを明らかにします これらのクラスター,特にPd10は,アセチレン水素化における反応速度と選択性を著しく高めます.

さらに関連する動画

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
10:22

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

18.7K
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions
11:44

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

25.9K

関連する実験動画

Last Updated: Jan 12, 2026

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry
07:53

Analysis of Complex Molecules and Their Reactions on Surfaces by Means of Cluster-Induced Desorption/Ionization Mass Spectrometry

Published on: March 1, 2020

7.8K
In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
10:22

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions

Published on: June 16, 2014

18.7K
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions
11:44

Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions

Published on: March 20, 2014

25.9K

科学分野:

  • 表面科学と触媒
  • コンピュータ材料科学
  • 化学工学

背景:

  • 反応条件下での触媒の再構成は既知の現象である.
  • 結合された地表と地下のダイナミクスが活性サイト形成と性能に影響を与える正確なメカニズムは不明である.
  • 効率的な触媒システムを設計するには,触媒の動作を理解することが重要です.

研究 の 目的:

  • 機械学習加速型マルチスケールフレームワークを開発し,適用する.
  • アクティブサイトの出現と性能における結合された表面と地表のダイナミクスの役割を明らかにする.
  • 主要なアクティブ・アンサンブルを特定し,構造と活動の関係を定量化する.

主な方法:

  • グランドカノンカルロ (GCMC) サンプリング,ニューラルネットワーク分子ダイナミクス (NNMD),および第一原理マイクロキネティクスの統合.
  • モデルシステムとしてPd触媒によるアセチレン水素化への適用
  • クラスタの高さと組成に基づく構造活動関係の分析

主要な成果:

  • オペラントの再編成は,炭化水素吸収と地下炭素によって誘発される単一の原子とクラスター (Pd1-Pd10) の形成につながります.
  • Pd10クラスタは支配的な活性アンサンブルとして特定され,約36,000倍の速度の増強と> 99%のエチレン選択性をもたらしました.
  • このアプローチは,複数の移行金属 (Ag,Cu,Au,Ni,Rh,Pt) で検証され,クラスター形成に適度な共吸収と地下炭素の必要性を示した.

結論:

  • 結合された表面と地表のダイナミクスは,触媒処理中の活性部位の出現と性能にとって極めて重要です.
  • 開発されたマルチスケール・フレームワークは,様々なシステムにおけるオペラント・カタリストの再構築を研究するための移行可能な方法を提供します.
  • この研究は,複雑な反応環境における活性と選択性の強化のための触媒設計に関する基本的な洞察を提供します.