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Catalysis02:50

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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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Heterogeneous Catalysis01:22

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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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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation02:17

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Updated: Apr 15, 2026

Spatial Separation of Molecular Conformers and Clusters
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Orchestrating structure and chemistry dynamics for cluster catalysis.

Jia-Lan Chen1,2, Hong-Yue Wang1,2, Chuan-Liang Ruan1,2

  • 1State Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei 230026, China.

National Science Review
|April 14, 2026
PubMed
Summary
This summary is machine-generated.

Supported metal catalysts are dynamic. We found three regimes of catalyst behavior, with optimal performance when structural changes and chemical reactions occur at similar rates. This time-scale matching is key for designing efficient catalysts.

Keywords:
dynamics of cluster catalysisstructure and chemistry dynamicssupported metal clusterstheoretical catalysis

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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
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Area of Science:

  • Catalysis
  • Materials Science
  • Surface Chemistry

Background:

  • Supported metal clusters offer high atom efficiency and unique low-coordination metal sites for catalysis.
  • These clusters are inherently dynamic under reaction conditions, leading to complex ensembles of metastable structures.
  • Understanding the interplay between cluster dynamics and surface chemistry is crucial but challenging.

Purpose of the Study:

  • To identify and characterize distinct dynamic regimes of supported metal clusters during catalysis.
  • To establish a universal metric for differentiating these regimes.
  • To provide a design principle for optimizing catalyst activity and stability.

Main Methods:

  • Investigated CO adsorption-desorption on size-selected Cu clusters supported on TiO2(110) as a model system.
  • Defined a dimensionless metric, Nc = τstruct / τchem, comparing structural rearrangement timescale (τstruct) and chemical residence time (τchem).
  • Analyzed catalyst behavior across three regimes: fluxional, kinetically trapped, and coupled.

Main Results:

  • Identified three universal regimes: fluxional (fast restructuring), kinetically trapped (slow restructuring), and coupled (dynamics and chemistry on comparable timescales).
  • Demonstrated that optimal catalytic activity and stability occur in the coupled regime (Nc ≈ 1), where multiple metastable isomers participate in turnover.
  • Showcased a master kinetic curve dependent on Nc, applicable across different metals (e.g., Cu, Ag, Au, Rh, Pd, Pt, Ru).

Conclusions:

  • Time-scale matching between structural dynamics and chemical reactions is a critical design rule for adaptive, fluxional catalysts.
  • The dimensionless metric Nc effectively differentiates catalytic regimes and guides catalyst optimization.
  • This framework enables the simultaneous maximization of activity and stability in supported metal cluster catalysts.