"Nanotechnology and nanomaterials"

Pd-Au nanocatalysts for methanol oxidation reaction
Dobrovetska O.1, Reshetnyak O.2, Saldan I.2, 
Semenyuk Y.2, Kuntyi O.1, Mertsalo I.1
1 Institute of Chemistry, Lviv Polytechnic National University, Bandery St. 12, 79013-Lviv, Ukraine, E-mail: oksana_dobrovetska@ukr.net
2 Department of Physical and Colloid Chemistry, Ivan Franko National University of Lviv. Kyryla and Mefodia St. 6, 79005-Lviv, Ukraine

Active studies of metallic nanoparticles, especially their structure and properties [1-3], gave a boost on the development of modern nanotechnologies. This opens a wide opportunity to use nanoparticles as efficient catalysts and sensors. In the last decade, a special attention was made to bimetallic nanostructured systems because of their functionality and synergetic effects. Among well-known bimetallic Pd-M (M = Ru, Ag, Au etc.) systems Pd-Au remains as the most promising catalytic object [2-3].
The catalytic activity of bimetallic Pd-Au nanoparticles was estimated by the method of cyclic voltammetry during methanol electrooxidation in alkaline medium. Anodic oxidation of methanol on pure glassy carbon (GC) surface did not lead to a chemical reaction while bimetallic Pd-Au nanoparticles on the GC surface resulted in an accelerated reaction that is faster than in case of Pd/GC or Au/GC electrodes. SEM-EDS and PXD measurements were used to analyze morphology, structure and distribution on the surface of bimetallic Pd-Au nanoparticles.

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