Pt nanoparticles supported on Sb-doped SnO2 porous structures: developments and issues.
Phys Chem Chem Phys
; 16(27): 13672-81, 2014 Jul 21.
Article
em En
| MEDLINE
| ID: mdl-24671116
ABSTRACT
In this work, high surface area antimony doped tin oxide (Sb-SnO2) has been synthesized using a modified sol-gel synthesis method. The bulk and surface properties of the metal oxide support have been investigated as a function of the processing conditions. A change in the Sb-SnO2 processing conditions, while preserving an overall invariant bulk composition, led to substantial modification of the surface stoichiometry. Accelerated stability test protocols have shown that the surface composition represents a crucial parameter for the electrochemical stability of Sb-SnO2. Model Pt/Sb-SnO2 electrodes have been developed depositing Pt nanoparticles by magnetron sputtering on the optimized Sb-SnO2 porous surface. A significant enhancement in the corrosion stability upon 1000 potential cycles between 0.5 and 1.5 V (RHE) at 50 mV s(-1) has been observed for the Pt/Sb-SnO2 system compared to Pt/carbon.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2014
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Article