J. Electrochem. Sci. Eng.  

Methanol oxidation at platinized copper particles prepared by galvanic replacement

Ioanna Mintsouli, Jenia Georgieva, Athanasios Papaderakis, Stephan Armyanov, Eugenia Valova, Volodymyr Khomenko, Stella Balomenou, Dimitrios Tsiplakides, Sotiris Sotiropoulos


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.


ransmetalation; Electrocatalysts; Platinum

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DOI: http://dx.doi.org/10.5599/jese.239

jESE : : Open Access Journal  :  : ISSN 1847-9286