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Elemental Segregation in Multimetallic Core-Shell Nanoplates.

Faisal Saleem1, Zhicheng Zhang1, Xiaoya Cui1

  • 1Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore.

Journal of the American Chemical Society
|August 30, 2019
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Summary
This summary is machine-generated.

Researchers created novel yolk-cage nanostructures from platinum-copper-palladium and ruthenium. These nanostructures demonstrate enhanced electrocatalytic performance for methanol oxidation, outperforming existing catalysts.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Two-dimensional (2D) core-shell nanostructures are crucial for advanced catalytic applications.
  • Developing novel nanostructures with enhanced catalytic activity and stability remains a key challenge.

Purpose of the Study:

  • To report an element segregation phenomenon in 2D core-shell nanoplates.
  • To synthesize unique yolk-cage nanostructures.
  • To evaluate the electrocatalytic performance of the synthesized nanostructures for methanol oxidation.

Main Methods:

  • Synthesis of PtCu@Pd core-shell nanoplates using PtCu nanoplates as templates.
  • Growth of Ru on PtCu@Pd nanoplates, leading to PtCuPd@PdCu@Ru nanoplates via selective element diffusion.
  • Selective electrochemical etching of PdCu to form PtCuPd@Ru yolk-cage nanostructures.

Main Results:

  • Observed element segregation during the growth of Ru on PtCu@Pd core-shell nanoplates.
  • Successfully synthesized PtCuPd@Ru yolk-cage nanostructures.
  • Demonstrated superior electrocatalytic activity and stability for methanol oxidation compared to PtCu nanoplates and commercial Pt/C.

Conclusions:

  • The developed yolk-cage nanostructures exhibit significant potential for efficient methanol oxidation.
  • The synthesis strategy offers a pathway to novel nanostructures with tailored properties.
  • This work advances the field of nanomaterials for electrocatalysis.