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首页> 外文期刊>ACS catalysis >Efficient Room-Temperature Aqueous-Phase Hydrogenation of Phenol to Cyclohexanone Catalyzed by Pd Nanoparticles Supported on Mesoporous MMT-1 Silica with Unevenly Distributed Functionalities
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Efficient Room-Temperature Aqueous-Phase Hydrogenation of Phenol to Cyclohexanone Catalyzed by Pd Nanoparticles Supported on Mesoporous MMT-1 Silica with Unevenly Distributed Functionalities

机译：介孔MMT-1硅胶上负载的Pd纳米颗粒催化的苯酚高效室温液相加氢制环己酮

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摘要

Efficient and selective aqueous-phase hydrogenation of phenol by a novel Pd catalyst supported on dually and selectively functionalized mesoporous MMT-1 silica nanoparticles has been developed. The catalyst features small (similar to 1.1 nm) Pd nanoparticles surrounded by unevenly distributed nitrogen- or heteroatom-free organic groups in the helical mesopores and the presence of non-hydrogen-bonded isolated silanol groups on the mesopore surface. The catalyst exhibited superior conversion of phenol and high selectivity of cyclohexanone at room temperature under atmospheric pressure of hydrogen and remained highly active after ten catalytic runs. The catalyst was active for the aqueous-phase hydrogenation of a variety of mono- and dihydroxylated aromatic compounds. The green protocol with the designed catalyst would be practical for the hydrogenation of phenol and other derivatives.
机译：已经开发了通过新型的Pd催化剂对苯酚进行高效，选择性的水相加氢，该催化剂负载在双重且选择性官能化的介孔MMT-1二氧化硅纳米粒子上。该催化剂的特征是小的（类似于1.1 nm）Pd纳米颗粒，周围被螺旋状中孔中分布不均匀的无氮或无杂原子有机基团包围，并且在中孔表面上存在未氢键键合的孤立硅烷醇基团。该催化剂在室温和氢气大气压下在室温下表现出优异的苯酚转化率和对环己酮的高选择性，并且在十次催化运行后仍保持高活性。该催化剂对多种单羟基和二羟基芳族化合物的水相加氢具有活性。具有设计好的催化剂的绿色方案对于苯酚和其他衍生物的氢化是实用的。

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