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Related Concept Videos

Catalysis02:50

Catalysis

27.5K
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: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.5K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

3.4K
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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Updated: Sep 9, 2025

Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
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Dynamic Restructuring of Stacking-Fault-Rich Copper Catalysts.

Feifei Zhang1,2, Chen Sun3, Hui Gao4

  • 1Department of Electronics, Nankai University, Tianjin, 300350, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 4, 2025
PubMed
Summary

Defect-rich copper catalysts are key for CO2 conversion. Particle size and reactive intermediates influence catalyst stability, with smaller particles reconstructing into nanopores, impacting sustainable applications.

Keywords:
catalysischemical potentialcopperstacking faultssurface reconstruction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Copper (Cu) catalysts with abundant defects are crucial for converting carbon dioxide (CO2) into valuable multi-carbon products.
  • The practical use of Cu catalysts is hindered by the thermodynamic instability of defects, leading to surface reconstruction during catalysis.

Purpose of the Study:

  • To investigate the factors influencing the reconstruction of stacking faults in Cu electrocatalysts.
  • To understand the role of particle size and COO-containing intermediates in defect stability.

Main Methods:

  • Experimental analysis
  • Theoretical analysis
  • Electrocatalytic testing

Main Results:

  • Particle size and COO-intermediates are identified as key drivers of catalyst reconstruction.
  • Defect stability in Cu catalysts is dependent on nanoparticle size.
  • Smaller nanoparticles (10 nm) reconstructed into 2.2 nm nanopores, while larger ones (30-60 nm) showed more stable stacking faults.

Conclusions:

  • Leveraging highly reactive intermediates can amplify defect stability.
  • Understanding size-dependent reconstruction is critical for designing stable Cu electrocatalysts.
  • Optimizing nanoparticle size is essential for sustainable applications of stacking-fault-rich Cu catalysts.