Nanosized platinum-gold alloys clusters have been deposited on gas diffusion electrode by sputter deposition. The deposits were characterized by FE-SEM, TEM and XPS in order to verify the formation of alloy nanoparticles and to study the influence of deposition technique on the nanomorphology. The deposition by sputtering process allowed a uniform distribution of metal particles on porous surface of carbon supports. Typical island growth mode was observed with the formation of a dispersed metal nanoclusters (mean size about 5 nm). Cyclic voltammetry was used to determine the electrochemical active surface and the electrocatalytic performance of the PtAu electrocatalysts for methanol oxidation reaction. The data were re-calculated in the form of mass specific activity (MSA). The sputter-catalyzed electrodes showed higher performance and stability compared to commercial catalysts. Copyright © 2011 American Scientific Publishers. All rights reserved.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Science(all)
- Biomedical Engineering
Giorgi, L., Giorgi, R., Gagliardi, S., Serra, E., Alvisi, M., Signore, M. A., & Piscopiello, E. (2011). Platinum-gold nanoclusters as catalyst for direct methanol fuel cells. Journal of Nanoscience and Nanotechnology, 11(10), 8804 - 8811. https://doi.org/10.1166/jnn.2011.3463