Selective phase transformation of layered double hydroxides into mixed metal oxides for catalytic CO oxidation

Phase transformation from layered double hydroxides (LDHs) into mixed metal oxides (MMOs) has been widely used in various catalytic applications owing to its numerous advantages over conventional synthesis methods. Herein we report the results of selective phase LDHs spinels and delafossites for preparation phase-pure MMO catalysts. Pure cuprous cupric were selectively obtained through heat treatment Cu-based followed by post-treatments. This enabled study crystalline-phase-dependent CO oxidation activity catalysts their physicochemical properties. The spinel exhibited higher activities, comparison with those delafossites, greater redox properties improved active sites adsorption. Although crystalline phases derived same LDH precursors, end product greatly influenced crystal structures. • Preparation copper-based Selective dependence carbon monoxide is studied Synthesis materials important studying structure-property relationship. Jang et al. prepared pure exploiting different atmospheric conditions. exhibit activities adsorption than delafossites.