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Selective phenol hydrogenation in aqueous phase on Pd-based catalysts supported on hybrid TiO_2-carbon materials

机译：在杂交TiO_2-碳材料上负载的Pd基催化剂水相中的选择性酚氢化

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摘要

T1O_2-C materials have been prepared by solvothermal and slurry synthesis and the influence of carbon properties upon the catalytic activity and selectivity of Pd-based catalysts on phenol hydrogenation in aqueous phase under mild reaction conditions has been studied [1]. The nature of the catalysts can be modified to direct the reaction either to cyclohexanol (~100% yield) or to cyclohexanone (~96% yield). High selectivity to cyclohexanone is obtained with Pd on more polar TiO_2-C supports, while when these are transformed into hydrophobic TiO_2-C supports the resultant catalyst becomes selective to cyclohexanol. Representative activities were also found with Pd on the more hydrophobic C supports with high selectivity to cyclohexanol. It can be concluded that product distribution during the selective phenol hydrogenation in aqueous phase is easily controlled by controlling the functionalization of the hybrid support.
机译：已经通过溶剂热量和浆料合成制备了T1O_2-C材料，并研究了在温和反应条件下的水相对水相对苯酚氢化催化活性和Pd基催化剂的催化活性和选择性的影响[1]。可以修饰催化剂的性质以将反应引导至环己醇（〜100％收率）或环己酮（〜96％收率）。在更多极性TiO_2-C载体上使用PD获得对环己酮的高选择性，而当这些转化成疏水性TiO_2-C时，则应催化剂对环己醇选择性。还发现代表性的活性在更疏水的C上具有高选择性对环己醇的疏水性C。可以得出结论，通过控制杂化载体的官能化容易控制在水相中选择性酚氢化期间的产品分布。

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