Journal of Electrochemical Science and Technology

The Korean Electrochemical Society (한국전기화학회)
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Pt Catalysts Prepared via Top-down Electrochemical Approach: Synthesis Methodology and Support Effects

  • Received : 2024.02.13
  • Accepted : 2024.04.23
  • Published : 2024.08.31
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Abstract

The synthesis of Pt nanoparticles and catalytically active materials using the electrochemical top-down approach involves dispersing Pt electrodes in an electrolyte solution containing alkali metal cations and support material powder using an alternating pulsed current. Platinum is dispersed to form particles with a predominant crystallographic orientation of Pt(100) and a particle size of approximately 7.6±1.0 nm. The dispersed platinum particles have an insignificant content of PtOx phase (0.25±0.03 wt.%). The average formation rate was 9.7±0.5 mg cm-2 h-1. The nature of the support (carbon material, metal oxide, carbon-metal oxide hybrid) had almost no effect on the formation rate of the Pt nanoparticles as well as their crystallographic properties. Depending on the nature of the support material, Pt-containing catalytic materials obtained by the electrochemical top-down approach showed good functional performance in fuel cell technologies (Pt/C), catalytic oxidation of CO (Pt/Al2O3) and electrochemical oxidation of methanol (Pt/TiO2-C) and ethanol (Pt/SnO2-C).

Keywords

Acknowledgement

This work was supported by the Ministry of Science and Higher Education of the Russian Federation, project FENN-2024-0002.

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