ethanol total oxidation over calcined layered double hydroxides modified with organic components
;Kovanda, F.;Zapivovarski Votipka, Z.;Raabová, H.;Jirátová, K.;Klempa, J.;Ludvíková, J.
creativity research journal2013Vol. 62pp. 137-146
126
f.2013kemijaethanol
Abstract
Coprecipitation of Co, Mn, and Al nitrates by a solution of Na2CO3 and NaOH in the presence of Pluronic ® P123 has led to layered double hydroxide (LDH) precursors with hydrotalcite-like structure. Their calcination gave spinel-type mixed oxides; the presence of organic template increased both BET and mesopore surface areas of the calcined products. TPR profiles of the samples modified with Pluronic ® P123 exhibited a shift of reduction maxima to lower temperatures, similarly as increasing sodium content in the catalysts. However, though the physical-chemical properties of Co-Mn-Al mixed oxides and their catalytic activity in ethanol oxidation were slightly improved, the changes evolved by the presence of Pluronic ® P123 during precipitation of LDH precursors were rather small.