Surfactant-Free Monodispersed Pd Nanoparticles Template for Core-Shell Pd@PdPt Nanoparticles as Electrocatalyst towards Methanol Oxidation Reaction (MOR)

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Abstract

An eco-friendly two-step synthetic method for synthesizing Pd@PdPt/CNTs nanoparticles was introduced and studied for the methanol oxidation reaction. The Pd@PdPt alloy core-shell structure was synthesized by preparing a surfactant-free monodispersed Pd/CNTs precursor through the hydrolysis of tetrachloropalladate (II) ion ([PdCl4 ]2− ) in the presence of carbon nanotubes (CNTs) and the subsequent hydrogen reduction and followed by a galvanic replacement reaction. This method opens up an eco-friendly, practical, and straightforward route for synthesizing monometallic or bimetallic nanoparticles with a clean surfactant-free electrocatalytic surface. It is quite promising for large-scale preparation. The Pd@PdPt/CNTs electrocatalyst demonstrated a high specific mass activity for methanol oxidation (400.2 mAmgPt−1 ) and excellent stability towards direct methanol oxidation compared to its monometallic counterparts.

Original languageEnglish
Article number260
JournalNanomaterials
Volume12
Issue number2
DOIs
Publication statusPublished - 14 Jan 2022

Keywords

  • Core-shell
  • Electrocatalysis
  • Fuel cells
  • Methanol oxidation
  • Nanoparticles
  • PdPt alloy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)

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