Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Intermolecular Forces03:13

Intermolecular Forces

61.2K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
61.2K
Bonding in Metals02:32

Bonding in Metals

48.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
48.1K
Hydrogen Bonds00:26

Hydrogen Bonds

125.4K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
125.4K
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
Intermolecular vs Intramolecular Forces03:00

Intermolecular vs Intramolecular Forces

89.6K
Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
89.6K
Molecular Orbital Theory II03:51

Molecular Orbital Theory II

19.8K
Molecular Orbital Energy Diagrams
19.8K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Surface-Engineered Core-Shell High-Entropy Alloy Nanoparticles with Reversible Structure for Low-Temperature NO Reduction.

ACS applied materials & interfaces·2026
Same author

In situ Generation of Fluoride Catalysts for CO<sub>2</sub>-to-Formic Acid Conversion With Silicon Reducing Agent.

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

Harnessing Support-Dependent Hydrogen Spillover for Ni-Based CO<sub>2</sub> Hydrogenation.

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

Porphyrin-Embedded Organosilica Photocatalysts for Efficient Hydrogen Peroxide Production.

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

Effect of immobilized amine structure on the formation and catalysis of Pd nanoparticles for oxidation of alcohols.

Chemical communications (Cambridge, England)·2026
Same author

Carbon-Driven Interfacial Charge Redistribution in TiO<sub>2</sub>-Ni(OH)<sub>2</sub> Photoanodes for Formate Production From Plastics and CO<sub>2</sub>.

Angewandte Chemie (International ed. in English)·2025

相关实验视频

Updated: Sep 14, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

13.0K

洞察由远程金属氧化物驱动的粒子间气溢出.

Kohsuke Mori1,2, Akihito Fujimoto1, Kazuki Shun1

  • 1Division of Materials and Manufacturing Science, Graduate School of Engineering, The University of Osaka, 2-1 Yamada-oka, Osaka 565-0871, Japan.

ACS applied materials & interfaces
|July 21, 2025
PubMed
概括

研究了粒子间溢出,即原子在不同的催化剂粒子之间移动. 这种现象在特定的金属氧化物支中被观察到,提供了新的催化剂设计策略.

关键词:
氧化氧化物是什么?二烯的合. 二烯的合气溢出问题 气溢出问题粒子间粒子之间的关系.金属氧化物金属氧化物氧化是一种氧化.氧化的氧化.

更多相关视频

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

26.9K
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

3.7K

相关实验视频

Last Updated: Sep 14, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
10:52

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

Published on: April 12, 2019

13.0K
Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
14:11

Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis

Published on: March 29, 2016

26.9K
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

3.7K

科学领域:

  • 不同质的催化剂.
  • 表面科学是一门科学.
  • 材料化学 材料化学

背景情况:

  • 气溢出涉及H2解离和气扩散在固体支上.
  • 粒子内部溢出效应得到了很好的研究,但粒子间溢出效应仍然不太了解.
  • 在界面上的粒子间溢出对于独特的催化性能至关重要.

研究的目的:

  • 系统地检查不同催化剂样本之间的粒子间气溢出.
  • 调查各种金属氧化物支在促进或阻碍溢出中的作用.
  • 为设计先进的催化剂支提供见解.

主要方法:

  • 用H2-温度编程降解 (H2-TPR) 来评估降解温度.
  • 在现场X射线吸收细结构 (XAFS) 用于结构分析.
  • 扩散反射红外里埃变换 (DRIFT) 光谱仪用于表面物种识别.

主要成果:

  • Ni2+/TiO2和Ni2+/WO3与Pt相结合时显示了降低的还原温度,表明成功的粒子间溢出.
  • Ni2+/CeO2没有表现出降低的还原温度,这表明它在这种情况下是一个无效的受体.
  • 粒子间反向溢出促进了/n-与Al-mont和TiO2支持的Pd的合.

结论:

  • 通过特定的催化剂-支持组合 (例如,Pt/TiO2,Pt/WO3) 实现了粒子间气溢出.
  • 选择的受体材料 (例如,CeO2) 显著影响溢出效率.
  • 这项研究为利用粒子间溢出利用工程催化剂提供了有价值的理解和设计原则.