Total oxidation of methanol low temperatures on (Cu, Mn)-Mg-Al mixed metal oxides derived from hydrotalcites

A series of (Cu, Mn)-Mg-Al hydrotalcite-like layered double hydroxides (HTs) was synthesized by a co-precipitation method.The incorporation of Mn into the Mg-Al and Cu-Mg- Al HTs structure was investigated by employing powder X-ray diffraction. Calcination of the precursors resulted in destruc- tion of the layered structure and led to low-crystalline MgO. Ob- tained mixed metal oxides were tested as catalysts for the process of total oxidation of methanol.The catalytic performance of the Cu-containing samples was better comparing to the Mn-based catalysts and decreased in the following order: Cu-Mg-Al > Cu- Mn-Mg-Al > Mn-Mg-Al > Mg-Al. Quantitative total oxidation of methanol was achieved at 325 C with Cu-Mg-Al mixed oxides.