Voltammetric investigation of nickel-platinum codeposits for methanol oxidation in KOH solutions

Ten-Chin Wen, Che Hao Hu, Chi Chang Hu

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10 Citations (Scopus)

Abstract

The electrochemical and electrocatalytic properties of Ni-Pt codeposits for methanol oxidation in an alkaline medium were characterized by cyclic voltammetry. The Ni-Pt codeposit with ca. Pt 60 a/o was found to exhibit the maximal activity for the oxidation of methanol in the low potential range. The electrocatalytic activity of all Ni-Pt codeposits (before and after leaching) for methanol oxidation was found to depend on their original compositions/textural properties before leaching. The hydroxyl Pt(IV) species with a higher hydrated property possessed a higher activity for the methanol oxidation and oxygen evolution reactions (OER). The presence of a hydroxyplatinum intermediate, Pt(OH)(ads), was proposed to be responsible for the anodic peaks of methanol oxidation in the less positive potential region on both positive and negative sweeps.

Original languageEnglish
Pages (from-to)515-524
Number of pages10
JournalJournal of the Chinese Institute of Chemical Engineers
Volume30
Issue number6
Publication statusPublished - 1999 Nov 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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