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Related Concept Videos

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...
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
Catalysis02:50

Catalysis

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.
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.

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Related Experiment Video

Updated: Jun 10, 2026

Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion
08:53

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Published on: January 30, 2018

Catalytically stable and active CeO2 mesoporous spheres.

Xin Liang1, Junjia Xiao, Biaohua Chen

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China. liangxin@mail.buct.edu.cn

Inorganic Chemistry
|August 24, 2010
PubMed
Summary

Researchers developed a simple one-step method to create uniform, high-surface-area cerium dioxide (CeO2) mesoporous spheres. These spheres show excellent catalytic stability and activity for carbon monoxide (CO) oxidation.

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Mesoporous materials offer high surface areas crucial for catalytic applications.
  • Cerium dioxide (CeO2) is a versatile material with significant catalytic properties.
  • Controlling the morphology and porosity of CeO2 is key to enhancing its performance.

Purpose of the Study:

  • To develop an efficient and straightforward method for synthesizing monodisperse CeO2 mesoporous spheres.
  • To characterize the structural properties, including surface area and pore topology, of the synthesized spheres.
  • To evaluate the catalytic performance and stability of the CeO2 spheres in CO oxidation reactions.

Main Methods:

  • A facile one-step synthesis strategy was employed.
  • Monodisperse CeO2 mesoporous spheres were prepared.
  • Characterization techniques were used to confirm size distribution, surface area, and pore structure.

Main Results:

  • The synthesis yielded monodisperse CeO2 mesoporous spheres with uniform size.
  • High surface areas and well-defined pore topologies were achieved.
  • The synthesized spheres exhibited significant catalytic stability and activity for CO oxidation.

Conclusions:

  • The developed one-step strategy is effective for producing high-quality CeO2 mesoporous spheres.
  • These advanced materials show promise for catalytic applications, particularly in CO oxidation.
  • The facile synthesis offers a scalable route for producing advanced cerium dioxide nanomaterials.