Original scientific paper
https://doi.org/10.5599/jese.239
Methanol oxidation at platinized copper particles prepared by galvanic replacement
Ioanna Mintsouli
; Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
Jenia Georgieva
; Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
Athanasios Papaderakis
; Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
Stephan Armyanov
; Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
Eugenia Valova
; Rostislaw Kaischew Institute of Physical Chemistry, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
Volodymyr Khomenko
; Kiev National University of Technologies and Design, Department for Electrochemical Power Engineering & Chemistry, Kiev 01011, Ukraine
Stella Balomenou
; Chemical Process & Energy Resources Institute, Centre for Research and Technology Hellas, 570 01, Thermi, Thessaloniki, Greece
Dimitrios Tsiplakides
; Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
Sotiris Sotiropoulos
; Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
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.
Keywords
Transmetalation; Electrocatalysts; Platinum
Hrčak ID:
156369
URI
Publication date:
21.4.2016.
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