Electrochemical Activity of Carbon-Supported Pt-Nanoparticles: Effect of Pt-Precursor Ligand and/or Presence of Anions During Polyol Synthesis

Kristian Juul Omann, Raghunandan Sharma*, Shuang Ma Andersen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

This study revisits the impacts of the presence of OH and Cl anions and/or different forms of Pt precursors during polyol synthesis of carbon-supported electrocatalysts. Efficiency of the synthesis process in terms of the %conversion of a Pt complex to Pt metal has been quantified. It is observed that Pt precursors based on [PtCl6]2− are reduced easily compared to those based on [Pt(OH)6]2−. Furthermore, presence of excess Cl during synthesis results in decreased %conversion and reduced ECSA, which is opposite from other reported work synthesized at higher temperature and pure solvents. For Pt/C synthesis under mild conditions, 100 °C and 30 vol% EG in water as solvent, presence of OH during synthesis decreases the ECSA and hence increases the Pt nanoparticle size and change of catalyst surface structure. Finally, a method to get insights into the surface structure of Pt-nanoparticles through analysis of the H-adsorption/H-desorption peaks has been proposed. Graphical Abstract: [Figure not available: see fulltext.].

Original languageEnglish
JournalElectrocatalysis
Volume15
Issue number1
Pages (from-to)96-109
ISSN1868-2529
DOIs
Publication statusPublished - Jan 2024

Keywords

  • Anion
  • Conversion efficiency
  • Microwave synthesis
  • Pt/C
  • Surface structure

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