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Directing Energy Flow in Core-Shell Nanostructures for Efficient Plasmon-Enhanced Electrocatalysis.

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This study introduces gold-palladium-platinum (Au@PdPt) core-shell nanostructures for enhanced electrocatalysis. These nanostructures efficiently convert light energy to drive catalytic reactions like methanol oxidation.

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bimetallic shellcore−shell nanostructuresmethanol oxidationoxygen reductionplasmon-enhanced electrocatalysis

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Plasmonic metal nanostructures can enhance catalytic activity by harvesting light energy.
  • Controlled configurations of plasmonic metals and active materials are crucial for efficient energy conversion.

Purpose of the Study:

  • To develop a bifunctional core-shell nanostructure for plasmon-enhanced electrocatalysis.
  • To investigate the catalytic performance of gold-palladium-platinum (Au@PdPt) core-shell nanostructures.

Main Methods:

  • Synthesis of octahedral gold (Au) nanocrystal core with a palladium-platinum (PdPt) alloy shell.
  • Electrocatalytic testing for methanol oxidation and oxygen reduction reactions under visible light.
  • Experimental and computational studies to understand the mechanism.

Main Results:

  • Au@PdPt core-shell nanostructures demonstrated significantly enhanced electrocatalytic activity.
  • Visible-light irradiation boosted the performance of the nanostructures.
  • Electronic hybridization in the PdPt alloy facilitated efficient plasmon energy distribution and relaxation.

Conclusions:

  • The Au@PdPt core-shell nanostructure serves as an effective platform for plasmon-enhanced electrocatalysis.
  • The unique electronic properties of the PdPt alloy shell are key to promoting catalytic activity.
  • This approach offers a promising strategy for light-driven energy conversion in catalysis.