Platinum sonoelectrodeposition on glassy carbon and gas diffusion layer electrodes

Bruno G. Pollet, Emmanuel F. Valzer, Oliver J. Curnick

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The electrodeposition of Pt on glassy carbon (GC) and gas diffusion layer (GDL) surfaces in dilute chloroplatinic acid solutions (10 mM PtCl 42- in 0.5 M NaCl) was performed potentiodynamically in the absence and presence of ultrasound (20 kHz) at various ultrasonic powers (up to 6 W) respectively and at (313 ± 2) K. In our conditions, it was found that platinum electrodeposition is an irreversible process which requires a substantial overpotential to drive the formation of Pt nuclei on the GC and GDL surfaces; however, under sonication Pt electrodeposition becomes more facile due to lower concentration and nucleation overpotentials and overall currents are significantly increased compared to silent conditions. It was also observed that the specific electrochemical surface area (SECSA) was significantly affected for Pt/GC and Pt/GDL electrodes prepared in the presence of rotation (GC only) and under sonication compared to those prepared under silent conditions. This finding was explained to be due to both larger and agglomerated platinum nanoparticles formed on the GC and GDL surface caused by forced convection. It was also found that ultrasound produced larger Pt nanoparticles on GC electrodes than those on GDL electrodes.

Original languageEnglish
Pages (from-to)6248-6258
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number10
Early online date29 Mar 2011
DOIs
Publication statusPublished - 1 May 2011
Externally publishedYes

Keywords

  • Fuel cells
  • GC
  • GDL
  • Platinum electrodeposition
  • Power ultrasound
  • Sonoelectrochemistry

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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