Synthesis and Corrosion Studies of Sb-Doped SnO2 (ATO) Support for Electrolysis Systems

Wednesday, 8 October 2014: 15:45
Sunrise, 2nd Floor, Jupiter 3 & 5 (Moon Palace Resort)
M. P. Gurrola, J. Guitiérrez Ramírez (Centro de Investigación y Desarrollo Tecnológico en Electroquímica), S. Rivas Gandara, M. Guerra-Balcázar, J. Ledesma-García (División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro), and L. G. Arriaga (Centro de Investigación y Desarrollo Tecnológico en Electroquímica)
This work deals with the corrosion resistance evaluation in acidic medium and electrochemical stability in a wide range (0 - 1.8 V vs ENH) for two different supports based on Sb doped SnO2 (ATO), one with low surface area (85 m2g-1) and the second one with a high surface area (216 m2g-1). Both materials were synthesized by sol - gel method and characterized by XRD, BET and HR-TEM. Both supports were compared with commercial Carbon Vulcan XC-72. The results show good chemical stability when the ATO and the modified-ATO are subjected to these conditions, whereas Vulcan carbon corrodes easily. This indicates that Sb-doped SnO2 is a good candidate for electrocatalyst supports for energy-conversion systems such as electrolysers and unified regenerative fuel cells.