Cobalt Oxides Supported Over Ceria–Zirconia Coated Cordierite Monoliths as Catalysts for Deep Oxidation of Ethanol and N2O Decomposition

Cordierite monoliths coated with ceria–zirconia supporting cobalt oxide were prepared, examined in the deep oxidation of ethanol and N 2 O decomposition, and compared with pelletized commercial cobalt oxide catalyst. Interaction of Co 3 O 4 with ceria–zirconia washcoat led to formation of Co 3 O 4 particles with slightly worse structure ordering resulting in better reducibility than that observed for the commercial Co 3 O 4 catalyst. In oxidation of ethanol, activity of the Co 3 O 4 -containing monoliths was comparable with that of pelletized cobalt oxide catalyst with nearly seven times higher content of active components. However, conversions of N 2 O over the monolith catalysts were lower. Nevertheless, incorporation of Co 3 O 4 onto ZrO 2 –CeO 2 washcoat increased rate of both catalytic reactions, i.e., N 2 O decomposition and deep ethanol oxidation. Graphical Abstract