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Updated: Jun 3, 2025

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Designer topological-single-atom catalysts with site-specific selectivity.

Weibin Chen1,2, Menghui Bao3, Fanqi Meng1

  • 1School of Materials Science and Engineering, Peking University, Beijing, P.R. China.

Nature Communications
|January 10, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed topological-single-atom catalysts (T-SACs) for superior NOx removal. This novel design enhances catalytic activity and selectivity, offering a sustainable alternative to traditional catalysts.

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Area of Science:

  • Materials Science
  • Catalysis
  • Environmental Chemistry

Background:

  • Designing catalysts with precisely controlled, identical active sites for high selectivity and activity is a persistent challenge in chemical synthesis and environmental remediation.
  • Existing catalysts often suffer from non-specific interactions between reactants and support materials, leading to reduced efficiency and unwanted side reactions.

Purpose of the Study:

  • To introduce a new catalyst design principle: topological-single-atom catalysts (T-SACs).
  • To demonstrate the superior performance of T-SACs in NOx removal.
  • To provide a systematic framework for designing advanced catalysts with defined site characteristics.

Main Methods:

  • Density Functional Theory (DFT) and Ab initio Molecular Dynamics (AIMD) calculations guided the design of T-SACs with specific asymmetric configurations.
  • Synthesis of Manganese single atoms on Cerium dioxide (Mn1/CeO2) catalysts using a charge-transfer-driven approach.
  • In-situ spectroscopic characterizations and DFT calculations were employed to elucidate reaction mechanisms.

Main Results:

  • The synthesized Mn1/CeO2 catalysts exhibited significantly enhanced catalytic activity and selectivity for NOx removal.
  • Topological design minimized unwanted reactant-support interactions by electronically shielding d orbitals.
  • A Life-Cycle Assessment (LCA) indicated a reduced environmental impact for Mn1/CeO2 compared to conventional V-W-Ti catalysts.

Conclusions:

  • T-SACs represent a promising class of catalysts offering a systematic approach to controlling site characteristics for improved catalytic performance.
  • The study establishes a viable pathway for developing highly selective and active catalysts for environmental applications.
  • This work promotes sustainable technologies through the development of advanced catalytic materials with lower environmental footprints.