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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

77
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...
77
Catalysis02:50

Catalysis

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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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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

4.0K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
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Concluding remarks: progress toward the design of solid catalysts.

Bruce C Gates1

  • 1Department of Chemical Engineering, University of California, Davis, Davis CA, USA. bcgates@ucdavis.edu.

Faraday Discussions
|May 26, 2016
PubMed
Summary
This summary is machine-generated.

Scientists are advancing catalyst design by understanding material surfaces. New methods in spectroscopy, microscopy, and theory are enabling the discovery of improved heterogeneous catalysts.

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Area of Science:

  • Heterogeneous catalysis
  • Materials science
  • Surface chemistry

Background:

  • Catalyst design is challenging due to the inherent non-uniformity of catalytic material surfaces.
  • A pragmatic approach to catalyst design involves discovering new catalysts based on fundamental understanding of their structure and performance.

Purpose of the Study:

  • To address forefront topics in catalysis and the challenges of catalyst design.
  • To highlight progress in understanding catalyst structure and performance.

Main Methods:

  • Utilizing advancements in spectroscopy and microscopy for surface characterization.
  • Employing theoretical calculations and simulations.
  • Implementing rigorous catalyst performance testing.

Main Results:

  • Demonstrated rapid progress in fundamental understanding of catalyst structure-performance relationships.
  • Showcased improvements in analytical techniques and testing methodologies.
  • Illustrated the development of new and improved heterogeneous catalysts.

Conclusions:

  • Fundamental understanding, coupled with advanced techniques, is driving progress in catalyst design.
  • The integration of spectroscopy, microscopy, theory, and testing is crucial for discovering superior catalysts.
  • Continued research in these areas promises significant advancements in catalysis.