Abstract
The specific activities of catalysts formed by thermal activation of the layered double hydroxide [Mg2.34Al (OH)6.68] (CO3)0.5·2.6H2O have been determined using 2-methyl-3-butyn-2-ol (MBOH) as an acid/base-selective substrate. Acetone and acetylene were the only reaction products formed over the temperature range 80–150°C, demonstrating that all of the LDHderived catalysts have highly basic selectivities. Thermal activation below the structural decomposition point of the LDH (⩽250°C) afforded catalysts with specific activities approximately an order of magnitude larger than the amorphous metal oxides and crystalline MgAl2U4 spinel-MgO mixtures formed by thermal activation at 450 and 890°C, respectively. Even the remnant LDH structure formed by partial decarbonation/dehydroxylation at 350°C was substantially more active than the more commonly used metal oxide derivatives.
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Constantino, V.R.L., Pinnavaia, T.J. Structure-reactivity relationships for basic catalysts derived from a Mg2+/A13+ /CO −3 layered double hydroxide. Catal Lett 23, 361–367 (1994). https://doi.org/10.1007/BF00811370
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DOI: https://doi.org/10.1007/BF00811370