Chemical and structural characterization of 'V IND.2''O IND.5'/Ti'O IND.2' catalysts - Rodella, Cristiane Barbieri; Nascente, Pedro A. P.; Mastelaro, Valmor Roberto; Zucchi, Maria do Rosário; Franco, R W A; Magon, Claudio José; Donoso, José Pedro; Florentino, Ariovaldo O (Journal of Vacuum Science & Tecnology A, 2001)