Mesoporous organic Pd-containing catalysts for the selective hydrogenation of conjugated hydrocarbons
作者:E. A. Karakhanov、A. L. Maksimov、I. A. Aksenov、V. S. Kuznetsov、T. Yu. Filippova、S. V. Kardashev、D. S. Volkov
DOI:10.1007/s11172-014-0657-9
日期:2014.8
Palladium catalysts supported on ordered organic mesoporous polymers were synthesized. The catalysts are characterized by the narrow size distribution of palladium nanoparticles with an average particle size of 2.2–5.2 nm. They demonstrate high catalytic activity and selectivity in phenylacetylene hydrogenation (896–2590 min−1, selectivity 89–98%). High activity and selectivity for alkenes are observed in the hydrogenation of conjugated dienes (for isoprene, TOF = 1850–5000 min−1, selectivity 99%; for 2,5-dimethyl-2,4-hexadiene, TOF = = 1294–2400 min−1, selectivity 100%; for 1,4-diphenyl-1,3-butadiene, TOF = 14–22 min−1, selectivity 7–16%). A dependence of the selectivity on the nature of the support and substrate was found for the hydrogenation of 1,4-diphenyl-1,3-butadiene.
负载在有序有机介孔聚合物上的钯催化剂被合成出来了。这些催化剂的特点是钯纳米颗粒大小分布狭窄,平均粒径在2.2至5.2纳米之间。它们在苯乙炔加氢反应中显示出高催化活性和选择性(活性范围896至2590分钟−1,选择性89至98%)。在共轭二烯的加氢反应中,它们对烯烃也表现出高活性和选择性(例如异戊二烯,转化频率TOF = 1850至5000分钟−1,选择性99%;对于2,5-二甲基-2,4-己二烯,TOF = 1294至2400分钟−1,选择性100%;对于1,4-二苯基-1,3-丁二烯,TOF = 14至22分钟−1,选择性7至16%)。发现1,4-二苯基-1,3-丁二烯的加氢反应选择性依赖于载体和底物的性质。