Electrocatalytic activity of core-shelll SnO2 @ Pt/C nanoparticles for oxygen reduction reaction - Rascio, Daniel C; Silva, J. C. M.; De Souza, R. F. B.; Calegaro, Marcelo Luiz; Santos, Mauro Coelho dos (Latin American Symposium on Solid State Physics - SLAFES, 2011)