Torrente-Murciano, Laura, Lapkin, Alexei A., Bavykin, Dmitry V., Walsh, Frank C. and Wilson, Karen
Highly selective Pd/titanate nanotube catalysts for the double-bond migration reaction
Journal of Catalysis, 245, (2), . (doi:10.1016/j.jcat.2006.10.015).
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Pd(II) and Pd(0) catalysts supported onto titanate nanotubes (H2Ti3O7) were prepared by an ion-exchange technique. The catalysts are characterised by narrow size distribution of metal nanoparticles on the external surface of the nanotubes. Pd(II) catalysts show high selectivity toward double-bond migration reaction versus hydrogenation in linear olefins. The catalytic activity exhibits a volcano-type dependence on the metal loading, with the maximum activity observed at ca. 8 wt%. The Pd(II) was shown to be rapidly reduced to Pd(0) by appropriate choice of solvent. Prereduced Pd(0) catalysts were found to be less active toward double-bond migration and more selective toward hydrogenation. The DBM reaction was faster in protic solvents, such as methanol or ethanol.
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