Effects of pH on dissolution and surface area loss of platinum due to potential cycling

Amar Prasad Yadav, Takayashi Okayasu, Yu Sugawara, Atsushi Nishikata, Tooru Tsuru

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

By using electrodeposited Pt nanoparticle electrodes, we clarify the relationship between the amount of dissolved Pt and the change in the electrochemical active surface area (ECA) of Pt due to potential cycling. Cyclic voltammetry of Pt was carried out in the pH range 0.4-4.0 in three different potential windows of 0.0-0.6, 0.0-1.0, and 0.0-1.4 V vs. RHE. The amount of dissolved Pt was almost negligible in the pH 3.0 solution; however, the ECA loss in this solution was almost similar to that observed in the pH 0.4 solution, in which the amount of dissolved Pt was the largest. The ECA loss was high up to the anodic potential limit of 1.0 V and almost remained constant when the potential was increased to the anodic potential limit of 1.4 V.

Original languageEnglish
Pages (from-to)C190-C194
JournalJournal of the Electrochemical Society
Volume159
Issue number4
DOIs
Publication statusPublished - 2012 Feb 29
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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