Synchrotron-based structural and spectroscopic studies of ball milled RuSeMo and RuSnMo particles as oxygen reduction electrocatalyst for PEM fuel cells

Research output: Contribution to journalArticle

Abstract

Particles of RuSeMo and RuSnMo have been produced by ball milling; they present catalytic activity towards the oxygen reduction reaction (ORR) in acid media. A Tafel slope close to 120 mV/dec was found for both materials. Their morphology was first characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). SEM and TEM images reveal particles in the sub-micrometer range. The structure of the materials was further probed with synchrotron radiation powder X-ray diffraction (SR-PXD) and X-ray absorption spectroscopy (XAS). SR-PXD reveals the existence of metallic Ru as the main phase and the formation of phases such as RuSe2 in RuSeMo and Ru3Sn7 in RuSnMo. Mo was found to form solid solution into the RuSe2 phase in ball milled RuSeMo. Finally, The Ru L-3-edge and Mo L-3-edge XAS fingerprints were correlated with the catalytic activity towards ORR. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

Details

Authors
  • Karina Suarez Alcantara
  • A. Ezeta-Mejia
  • M. Ortega-Aviles
  • Dörthe Haase
  • E. Arce-Estrada
  • R. G. Gonzalez-Huerta
  • O. Solorza-Feria
  • S. E. Canton
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Natural Sciences
  • Physical Sciences

Keywords

  • Ruthenium particles, Electrocatalyst, Fuel cells, Synchrotron radiation
Original languageEnglish
Pages (from-to)16715-16721
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number29
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes