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Xiaoxuan Yang1, Gang Wu1

  • 1Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.

Angewandte Chemie (International Ed. in English)
|December 8, 2022
PubMed
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Researchers created high-density platinum single atoms within cobalt oxide, utilizing the Hard-Soft Acid-Base principle to understand their interactions and structural changes. This work offers insights into single-atom catalyst design and stability.

Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Single-atom catalysts (SACs) offer high atom utilization efficiency and unique catalytic properties.
  • Controlling the coordination environment and stability of single atoms is crucial for catalyst performance.
  • Understanding the dynamic evolution of single-atom sites under reaction conditions is essential for rational design.

Purpose of the Study:

  • To design and construct high-density platinum (Pt) single atoms within a cobalt oxide (Co3O4) host.
  • To investigate the inter-site interactions of these single atoms using the Hard-Soft Acid-Base (HSAB) principle.
  • To reveal the dynamic structural evolution of single-atom sites during catalytic processes.

Main Methods:

  • Synthesis of high-density Pt single atoms in a Co3O4 host.
Keywords:
Controllable SynthesisHard-Soft Acid-Base PrincipleMetal-Metal InteractionsSingle Atom CatalystsStructure Evolution

Related Experiment Videos

  • Application of the Hard-Soft Acid-Base principle to understand metal-support interactions.
  • Utilizing in situ/ex situ spectroscopic techniques (e.g., X-ray absorption spectroscopy, electron microscopy) to probe structural evolution.
  • Employing theoretical computation (e.g., density functional theory) to model dynamic processes.

    • Main Results:

    • Successful construction of high-density Pt single atoms anchored in the Co3O4 lattice.
    • Demonstration of significant inter-site interactions between Pt atoms, influenced by the HSAB principle.
    • Observation of dynamic structural changes and potential aggregation/restructuring of Pt single atoms under specific conditions.
    • Theoretical validation of the experimental findings regarding atomic structure and evolution.

    Conclusions:

    • The study successfully demonstrates the rational design of high-density Pt single atoms in Co3O4.
    • The HSAB principle provides a valuable framework for understanding and controlling single-atom interactions and stability.
    • Revealing the dynamic structural evolution is key to optimizing SACs for enhanced catalytic performance and longevity.