Characterization of iron-cobalt oxide catalysts: Effect of different supports and promoters upon the structure and morphology of precursors and catalysts

Synthesis and microstructure of cobalt ferrite nanoparticles

“…In fact, ferrites are already effective catalysts for various processes like treatment of exhaust gases [9], oxidation of toluene [10] or propane [11], gas sensing [12]. Nickel ferrites showed good catalytic properties in the presence of reducing gas such as CO [13], and cobalt ferrites were tested for the Fischer Tropsch reaction [14].…”

Bimetallic Co–Fe and Co–Cr oxide systems supported on CeO2: Characterization and CO oxidation catalytic behaviour

“…Thus, while in the monometallic references, most stable single oxides of Cr, Fe or Co are detected (i.e. Cr 2 O 3 , a-Fe 2 O 3 and Co 3 O 4 [32,33]), peaks detected in the CoeCr and CoeFe bimetallic systems correspond to binary spinel oxides CoCr 2 O 4 and CoFe 2 O 4 [33,34], not being evident in any case the presence of single oxides. This suggests, considering the respective metal loadings of the bimetallic catalysts, that a part of the cobalt remains in both cases as XRD-silent highly dispersed cobalt oxide entities.…”

Preparation and operating conditions for cobalt cerium oxide catalysts used in the conversion of synthesis gas into light olefins

“…In our previous studies [32][33][34][35][36][37][38][39][40] we demonstrated the importance of ageing time with respect to catalyst activity for the oxidation of CO by mixed copper manganese oxides and mixed copper zinc oxides. We have also studied the effect of ageing time on the performance of mixed iron cobalt oxide [41,42] and mixed cobalt manganese oxide [43] catalysts for FTS. The results of all of these investigations have shown that the ageing of the precipitates obtained by co-precipitation leads to phase changes toward forms that are more thermodynamically stable.…”