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

相关实验视频

Updated: Jun 30, 2026

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
07:47

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

纳米级材料中不寻常的非散装性质:玛-胺支持的Pt催化剂的热金属-金属键收缩.

Joo H Kang1, Laurent D Menard, Ralph G Nuzzo

  • 1School of Chemical Sciences and Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.

Journal of the American Chemical Society
|September 14, 2006
PubMed
概括

在-上,亚纳米米纳米粒子表现出负热膨胀,在加热时收缩. 吸附减少了这种由支相互作用影响的-Pt键收缩.

相关概念视频

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

Applicability of the small anharmonicity approximation to electrostriction in Zr-doped ceria.

Physical chemistry chemical physics : PCCP·2026
Same author

A miniaturized implantable electrochemical platform for continuous monitoring of metabolites in deep tissue.

Science advances·2026
Same author

Mechanically Spatio-Chimeric Fibrin Assembly Enables Vascular-Integrated Muscle Reconstruction for Volumetric Muscle Loss Repair.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Seed-Mediated Colloidal Synthesis of Multimetallic and High-Entropy Alloy Nanocrystal Libraries with Enhanced Catalytic Performance.

Journal of the American Chemical Society·2026
Same author

Basal Plane Doping to Activate Colloidal MoS<sub>2</sub> Nanosheets for Catalytic Hydrodeoxygenation of <i>para-</i>Cresol.

ACS applied materials & interfaces·2026
Same author

Morphological descriptors of nanoparticles: The link between atomistic structures and x-ray absorption spectra.

The Journal of chemical physics·2026

科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 物理化学 物理化学

背景情况:

  • 了解纳米粒子的行为对于催化是至关重要的.
  • 纳米材料的热膨胀特性可能与散装材料有很大差异.
  • 玛是一种在异质催化中常见的支材料.

研究的目的:

  • 为了研究亚纳米米纳米颗粒的热膨胀行为.
  • 为了确定吸附对纳米粒子热性质的影响.
  • 阐明支持相互作用在纳米粒子热膨胀中的作用.

主要方法:

  • 采用了可变温度X射线吸收光谱 (XAS).
  • 测量是在纳米颗粒上进行的,这些纳米颗粒支着光.
  • 分析了X射线吸收接近边缘结构 (XANES) 的光谱.

主要成果:

  • - (Pt-Pt) 债券呈现负热膨胀 (NTE),随着温度的增加而收缩.
  • 裸Pt集群的平均线性膨胀系数为-2.5 x 10^-5 K^-1.
  • 吸附导致了键放松,并减少了Pt-Pt热收缩.

结论:

  • 在玛胺支和Pt集群之间,温度依赖的电荷转移驱动了观察到的NTE行为.
  • 支相互作用显著影响亚纳米米纳米粒子的热膨胀.
  • 吸附改变了这些支相互作用,影响了热膨胀.

更多相关视频

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes
13:08

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes

Published on: May 18, 2020

相关实验视频

Last Updated: Jun 30, 2026

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
07:47

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes
13:08

A Salt-Templated Synthesis Method for Porous Platinum-based Macrobeams and Macrotubes

Published on: May 18, 2020