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Yeast Colony Embedding Method
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Pt-Embedded CuO

Ke Wu1, Xin-Pu Fu2, Wen-Zhu Yu2

  • 1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, and College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China.

ACS Applied Materials & Interfaces
|September 13, 2018
PubMed
Summary
This summary is machine-generated.

New platinum-embedded copper oxide-ceria multicore-shell (Pt/CuO x-CeO2 MS) catalysts were synthesized for CO oxidation. Optimal composition yields superior activity and durability, offering insights for designing advanced heterogeneous catalysts.

Keywords:
CO oxidationPt embedded CuOx−CeO2 catalystinterfacial redox reactionmetal−support interactionsynergistic catalysis mechanism

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Developing efficient heterogeneous catalysts is crucial for sustainable energy solutions.
  • CO oxidation is a key probe reaction for evaluating catalyst performance.
  • Multicomponent catalysts offer potential for enhanced catalytic activity and stability.

Purpose of the Study:

  • To fabricate and characterize Pt-embedded CuO x-CeO2 multicore-shell (Pt/CuO x-CeO2 MS) composites.
  • To investigate the composition-dependent catalytic activity of these composites for CO oxidation.
  • To elucidate the structure-activity relationships and the mechanism of synergistic catalysis.

Main Methods:

  • One-pot, template-free synthesis at room temperature.
  • Interfacial autoredox process for in situ encapsulation of Pt nanoparticles (NPs).
  • Deposition/precipitation-calcination for CuO x cluster adhesion.
  • Characterization of coordination structures and oxygen vacancies.
  • Evaluation of catalytic performance in CO oxidation.

Main Results:

  • Pt/CuO x-CeO2 MS composites exhibited a volcano-shaped relationship between composition and catalytic activity.
  • An interfacial autoredox process facilitated the formation of the MS structure.
  • Synergistic effects between Pt, CuO x, and CeO2 enhanced CO oxidation.
  • Optimal Pt/Cu ratios led to high activity and durability, avoiding detrimental strongly bound structures.
  • The presence of oxygen vacancies and thin oxide layers on Pt NPs were key factors.

Conclusions:

  • The developed Pt/CuO x-CeO2 MS composites demonstrate tunable and superior catalytic performance for CO oxidation.
  • The synthesis strategy provides a facile route for creating advanced multicomponent catalysts.
  • Understanding the interfacial and synergistic effects is vital for designing next-generation heterogeneous catalysts for clean energy applications.