ZnO based nanowires grown by chemical vapour deposition for selective hydrogenation of acetylene alcohols
Data(s) |
01/08/2011
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Resumo |
Vertically aligned ZnO nanowires (NWs) with a length of 1.5-10 mu m and a mean diameter of ca. 150 nm were grown by chemical vapour deposition onto a c-oriented ZnO seed layer which was deposited by atomic layer deposition on Si substrates. The substrates were then spin-coated with an ethanol solution containing Pd nanoparticles with an average size of 2.7 and 4.5 nm. A homogeneous distribution of the Pd nanoparticles on ZnO NWs has been obtained using both Pd particle series. The catalytic activity of the ZnO NWs and Pd/ZnO NWs catalysts was measured in the semihydrogenation of 2-methyl-3-butyn-2-ol at 303-343 K and a pressure of 2-10 bar. The effect of the solvent used on the catalytic performance of the Pd/ZnO NWs catalyst was studied. The Pd/ZnO catalysts showed alkene selectivity of up to 95% at an alkyne conversion of 99%. A kinetic model is proposed to explain the activity and selectivity of the ZnO support and Pd/ZnO catalysts. |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/closedAccess |
Fonte |
Protasova , L N , Rebrov , E V , Choy , K L , Pung , S Y , Engels , V , Cabaj , M , Wheatley , A E H & Schouten , J C 2011 , ' ZnO based nanowires grown by chemical vapour deposition for selective hydrogenation of acetylene alcohols ' Catalysis, Science & technology , vol 1 , no. 5 , pp. 768-777 . DOI: 10.1039/c1cy00074h |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/1500/1503 #Catalysis |
Tipo |
article |