The electrochemical activity of two binary alloy catalysts toward oxygen reduction reaction in 0.1 M KOH

E. Härk*, R. Jäger, P. E. Kasatkin, P.F. Möller, R. Kanarbik, I. Tallo, U. Joost, Jaan Aruväli, P. Paiste, H. Jiang, T. Kallio, K. Kirsimäe, E. Lust

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The platinum group metals (Pt, Ir and Ru) and the carbide-derived carbon support with the very high specific surface area were used to synthesise the low noble metal loading Pt-C, IrPt-C and RuPt-C alloy catalysts. The alloying of the platinum group metals in the studied catalysts was proved by the several independent physical characterization methods like: the X-ray diffraction, time of flight secondary ion mass-spectrometry, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy. The electrocatalytic activity toward oxygen reduction reaction of the synthesised catalysts in an alkaline solution was studied and compared with the commercially available Pt-Vulcan. The combined and detail approach using the transmission electron microscopy and inductively coupled plasma mass spectrometry for estimation of the surface area of metal particles is provided. The noticeably higher calculated mass corrected and specific kinetic current density values for Pt-C catalyst were established. For IrPt-C and RuPt-C alloy catalysts, mass corrected current density values are comparable with the commercial Pt-Vulcan. The specific kinetic current density values increase in the following sequence: RuPt-C < IrPt-C < Pt-Vulcan < Pt-C.

Original languageEnglish
Pages (from-to)31–40
Number of pages10
JournalJOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume22
Issue number1
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbide-derived carbon support
  • Low platinum group metal loading
  • Oxygen reduction reaction
  • Rotating disc electrode
  • Specific kinetic current density

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    Sustainable platinum group metal free catalyst materials

    Sorsa, O., Kallio, T., Rauhala, T. & Davodi, F.

    01/09/201523/09/2019

    Project: Academy of Finland: Other research funding

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