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Heterogeneous Catalysis

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...

Catalysis

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.

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Updated: Mar 24, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

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

Oxide Nanocrystal Model Catalysts.

Weixin Huang¹

¹Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Chemical Physics, University of Science and Technology of China , Hefei 230026, China.

Accounts of Chemical Research

|March 4, 2016

Summary

This summary is machine-generated.

Oxide nanocrystal model catalysts overcome traditional limitations by enabling surface chemistry studies under realistic conditions. This approach reveals morphology-dependent catalytic properties, paving the way for designing efficient oxide catalysts.

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Area of Science:

Materials Science
Catalysis
Surface Chemistry

Background:

Traditional oxide model catalysts face "materials" and "pressure" gaps due to ultrahigh-vacuum studies.
Oxide nanocrystals synthesized via colloidal methods offer uniform, well-defined surfaces for realistic catalysis research.

Purpose of the Study:

To demonstrate the concept of oxide nanocrystal model catalysts using cuprous oxide and ceria.
To investigate the influence of crystal facets on surface chemistry and catalytic activity.

Main Methods:

Controlled synthesis of cuprous oxide (Cu2O) and ceria nanocrystals with specific crystal facets ({100}, {111}, {110}).
Studying surface chemistry and catalytic reactions (CO oxidation, propylene oxidation) under relevant pressure conditions.
Correlating surface composition and structure with catalytic performance.

Main Results:

Cu2O nanocrystals with different facets ({100}, {111}, {110}) showed distinct reactivities and catalytic properties.
1-fold-coordinated Cu on Cu2O(111) facets were identified as highly active sites.
Ceria nanocrystal morphology influenced oxygen vacancy concentration and metal-ceria interactions, impacting catalytic performance.

Conclusions:

Oxide nanocrystal model catalysts bridge the "materials" and "pressure" gaps, enabling fundamental understanding of oxide catalysis.
Morphology engineering of oxide nanocrystals is a viable strategy for optimizing catalytic performance.
This approach facilitates the rational design and synthesis of novel, efficient oxide catalysts.