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相关概念视频

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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相关实验视频

Updated: Jun 12, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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具有精心设计的纳米结构的多功能半孔复合微球:一个高度集成的催化剂系统.

Yonghui Deng1, Yue Cai, Zhenkun Sun

  • 1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, People's Republic of China.

Journal of the American Chemical Society
|May 29, 2010
PubMed
概括

研究人员开发了使用金纳米粒子进行催化的多功能磁性微球. 这些新的纳米复合材料为工业应用提供了高效率,可重复使用性和易于磁性分离.

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Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica
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Last Updated: Jun 12, 2026

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

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica
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Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica

Published on: July 9, 2015

科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 催化剂是一种催化剂.

背景情况:

  • 集成功能纳米复合材料需要精确控制组件大小,形态,表面化学和组装.
  • 开发先进的催化材料对于高效的工业过程至关重要.

研究的目的:

  • 制造具有独特纳米结构的多功能微球,以提高催化性能.
  • 研究设计的微球的催化活性,选择性和可重复使用性.

主要方法:

  • 微球的制造与一个有氧化保护的磁铁核,一个金纳米粒子过渡层,和一个有序的半孔外.
  • 描述微球的特性,包括磁化,表面积和孔隙结构.
  • 在减少4-尼托芬醇和烯环氧化过程中的催化性能评估.

主要成果:

  • 这些微球具有很高的磁化 (18.6 emu/g) 和很大的表面积 (236 m2/g).
  • 它们在高度开放的中介孔 (约. 2.2 nm) 的时间.
  • 观察到高的催化效率:在12分钟内95%的4-尼托芬醇转化和72%的转化,对烯环氧化有80%的选择性.

结论:

  • 设计的多功能微球作为一种新,稳定和可访问的催化剂系统.
  • 它们的磁分离性,可重复使用性和高催化性能使它们适合各种工业催化过程.