Methanol oxidation at platinized copper particles prepared by galvanic replacement

  • Ioanna Mintsouli Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124
  • Jenia Georgieva Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113
  • Athanasios Papaderakis Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124
  • Stephan Armyanov Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113
  • Eugenia Valova Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113
  • Volodymyr Khomenko Kiev National University of Technologies and Design, Department for Electrochemical Power Engineering & Chemistry, Kiev 01011
  • Stella Balomenou Chemical Process & Energy Resources Institute, Centre for Research and Technology Hellas, 570 01, Thermi, Thessaloniki
  • Dimitrios Tsiplakides Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124 and Chemical Process & Energy Resources Institute, Centre for Research and Technology Hellas, 570 01, Thermi, Thessaloniki
  • Sotiris Sotiropoulos Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124
Keywords: ransmetalation, Electrocatalysts, Platinum

Abstract

Bimetallic Pt-Cu particles have been prepared by galvanic replacement of Cu precursor nanoparticles, upon the treatment of the latter with a chloro-platinate acidic solution. The resulting particles, typically a few tens of nm large, were supported on high surface area carbon (Vulcan® XC–72R, Cabot) and tested as electrodes. Surface electrochemistry in deaerated acid solutions was similar to that of pure Pt, indicating the existence of a Pt shell (hence the particles are denoted as Pt(Cu)). Pt(Cu)/C supported catalysts exhibit superior carbon monoxide and methanol oxidation activity with respect to their Pt/C analogues when compared on a per electroactive surface area basis, due to the modification of Pt activity by Cu residing in the particle core. However, as a result of large particle size and agglomeration phenomena, Pt(Cu)/C are still inferior to Pt/C when compared on a mass specific activity basis.

Downloads

Download data is not yet available.
Published
21-04-2016