Selective phenol hydrogenation in aqueous phase on Pd-based catalysts supported on hybrid TiO2-carbon materials
Selective phenol hydrogenation in aqueous phase on Pd-based catalysts supported on hybrid TiO2-carbon materials
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DOI：
10.1016/j.apcata.2011.07.018
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发表时间：
2011-09
影响因子：
5.5
通讯作者：
J. Matos;A. Corma
中科院分区：
文献类型：
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作者：
J. Matos;A. Corma
采用溶剂热法和浆料法制备了TiO2-C材料，并在温和反应条件下研究了碳的性质对钯基催化剂水相苯酚加氢活性和选择性的影响。催化剂的性质可以被修改，以直接反应成环己醇（~ 100%收率）或环己酮（~ 96%收率）。钯在极性较高的TiO2-C载体上对环己酮具有较高的选择性，而当这些载体转化为疏水性TiO2-C载体时，所得到的催化剂对环己醇具有选择性。因此，通过控制杂化载体的功能化，可以很容易地控制苯酚在水相中选择性加氢过程中的产物分布。
TiO2-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. 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 TiO2-C supports, while when these are transformed into hydrophobic TiO2-C supports the resultant catalyst becomes selective to cyclohexanol. Thus, product distribution during the selective phenol hydrogenation in aqueous phase is easily controlled by controlling the functionalization of the hybrid support.