Research Article

Co3O4 Catalysts on CeO2-ZrO2 Supports and Co3O4-CeO2 Catalysts on Al2O3/SiO2 Supports for the Oxidation of Propylene

Figure 5

SEM images of CeO2-Co3O4 catalyst with Ce/Co molar ratio of 5/5 on Al2O3 (a) and SiO2 supports (b).
(a)
(b)