Low-temperature deep oxidation of olefins and DME over cobalt ferrite

Cobalt-iron oxides made by CVD for low temperature catalytic application

“…The micrographs of CoFe 2 O 4 display a good homogeneity and exhibit open porosity. The observed open porosity is suggested to be caused by the competitive growth between cobalt and iron during the deposition, in excellent agreement with our recent work on cobalt ferrite mixed oxides . The observed morphology with open porosity is expected to track great amount of oxygen and thus will improve the catalytic performance.…”

“…The temperature at the complete oxidation is 475 °C for C 3 H 6, 485 °C for n ‐C 4 H 8 , and 506 °C for DME. These values appear to be higher than those for Co 2.1 Fe 0.9 O 4 catalysts, where complete oxidation occurs at 400, 425, and 446 °C for C 3 H 6 , n ‐C 4 H 6 , and DME, respectively . However, they are lower than those observed for C 3 H 6 on Au/Al 2 O 3 and La 1.7 Sr 0.3 CuO 4 S 0.2 .…”

“…Both O 2 2− and O − species are strongly electrophilic reactants, which can attack an organic molecule in the region of its highest electron density, and therefore result in the oxidation of the carbon skeleton . Thus, the adsorbed and lattice oxygen present at the surface of CoFe 2 O 4 oxides are expected to have a beneficial effect on the total oxidation of CO, C 3 H 6 , n ‐C 4 H 8 , and DME as reported in the literature .…”

“…Despite of their good catalytic performances, Co‐BMO such as cobalt ferrite mixed oxides (CoFe 2 O 4 ) have been scarcely used as catalyst towards catalytic conversion of olefins and dimethyl ether (DME). More recently, cobalt ferrite with a composition of Co 2.1 Fe 0.9 O 4 has been prepared and used as catalyst for oxidation of CO, DME, C 3 H 6 , and n ‐C 4 H 8 . Since it showed very interesting catalytic performance against the deep oxidation of the above‐listed compounds, it was very interesting and desirable to explore another composition, which is CoFe 2 O 4 (low cobalt content) for the same application.…”

CVD‐Made Spinels: Synthesis, Characterization and Applications for Clean Energy

“…Among TMOs, single and mixed oxides, such as manganese and cobalt oxides, perovskites, zirconia-based catalysts, have been claimed for their effectiveness in VOCs oxidation [14][15][16][17][18][19]. In particular, Co 3 O 4 -based catalysts, which have been studied several decades ago regarding the high activity for CO and VOCs oxidation [20][21][22], have received again considerable attention in the recent years [23][24][25][26][27][28]. However, the physico-chemical and catalytic properties of TMOs thin films can be modulated with respect to the morphology, surface and bulk composition as well as metallic ratio, which are strongly dependent upon the preparation approaches and experimental conditions [29][30][31][32].…”