Pt nanoparticles supported on Sb-doped SnO2 porous structures: developments and issues
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.
- This article is part of the themed collection: Electrocatalysis - Fundamental Insights for Sustainable Energy