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Modeling an Enzyme Active Site using Molecular Visualization Freeware
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Atomically-thin two-dimensional sheets for understanding active sites in catalysis.

Yongfu Sun1, Shan Gao, Fengcai Lei

  • 1Hefei National Laboratory for Physical Sciences at Microscale, Collaborative Innovation Center of Chemistry for Energy Materials, University of Science & Technology of China, Hefei, 230026, P. R. China. yxie@ustc.edu.cn.

Chemical Society Reviews
|November 11, 2014
PubMed
Summary
This summary is machine-generated.

Atomically-thin two-dimensional sheets offer an ideal model for studying catalyst active sites. Understanding atomic coordination and defects reveals key factors influencing catalytic activity in reactions like CO oxidation and water splitting.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Catalysis

Background:

  • Catalytic reactions are accelerated by active sites, typically low-coordinated atoms on catalyst surfaces.
  • The precise relationship between active site characteristics and catalytic activity remains unclear due to discrepancies between theoretical models and real catalysts.

Purpose of the Study:

  • To review recent advancements in understanding the factors influencing reactive site activity in catalysis.
  • To highlight the utility of atomically-thin two-dimensional sheets as model systems for studying active site-catalytic activity relationships.

Main Methods:

  • Characterization of atomic coordination number, structural defects, and disorder using X-ray absorption fine structure spectroscopy, positron annihilation spectroscopy, electron spin resonance, and high-resolution transmission electron microscopy.
  • Overview of applications in CO catalytic oxidation, photocatalytic water splitting, and electrocatalytic oxygen and hydrogen evolution reactions.

Main Results:

  • Demonstration of the atomic-level interplay between coordination number, structural defects/disorder, active sites, and catalytic activity in 2D sheets.
  • Identification of key factors affecting the performance of reactive sites in various catalytic processes.

Conclusions:

  • Atomically-thin two-dimensional sheets provide valuable insights into the fundamental role of active sites in catalysis.
  • Further research in this area is crucial for the development of novel, highly active catalysts.