Desorption and catalytic study of iron modified MCM-41 silica by 11C-radiolabeled methanol

Cobalt-modified mesoporous MgO, ZrO2, and CeO2 oxides as catalysts for methanol decomposition

“…We could speculate that thus obtained oxygen vacancies on the solid facilitate the formation of surface methoxy species and their further decomposition to CO and H 2 and/or to DME. In this aspect, the highest catalytic activity and selectivity to CO that was observed for Co/CeO 2 could be ascribed to the higher polarization of the metal-oxygen bonds in the Co-O-Ce catalytic complex, providing easier release of oxygen from the solid [64]. On the contrary, lower catalytic activity (Fig.…”

“…5) is observed for Co/SiO 2 and Co/ZrO 2 . This assumption is especially well illustrated for the Co/MgO material, where the lowest catalytic activity is probably related to the strongest interaction between the hosted cobalt species and the support, probably due to the formation of MgCo 2 O 4 [64]. Just the opposite, the higher dehydration activity of cobalt modifications could be ascribed to the formation of Co-O-S catalytic active complexes with less polarized bonds and strong Lewis acidic activity (Co/SiO 2 and Co/ZrO 2 ).…”