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将分别带有正、负电荷基团的季铵盐酞菁钴CoPc[N(CH3 ) 3 I]4 和磺酸盐酞菁钴CoPc(SO3 Na) 4溶解在一起 ,负载在由水滑石热分解而成的MgAl复合氧化物碱性载体上 ,制成负载离子对型酞菁钴催化剂 ,其所具有的碱性、氧化性双功能的特征能够有效地催化 1 辛硫醇氧化 .当这两种酞菁钴配合物的摩尔比为 1时 ,催化活性最高 ,并且稳定性也有较明显的改善 .这种双功能催化剂体系具有酶催化的特点 ,即遵循双底物 ( 1 C8H17SH和O2 )Michaelis Menten动力学规律 ;表观活化能Ea=5 0 .4kJ·mol-1.在一定范围内提高二元酞菁钴混合物的负载量 ,单位酞菁钴中心的活性基本保持恒定 ,表明形成的二聚体络合物可在一定程度上抑制酞菁钴分子的聚集 ,改善催化剂的性能 .同时 ,增大Mg(Al)O载体量即碱中心数 ,有利于催化剂活性和稳定性的提高 .这类新型双功能催化剂具有工业应用的前景 .
Cobalt phthalocyanine CoPc [N (CH3) 3 I] 4 and sulfonate cobalt phthalocyanine CoPc (SO3Na) 4, each bearing a positive and a negative charge group, are dissolved together and supported on a slurry prepared from hydrothermal Decomposition of MgAl composite oxide basic support, made of supported ion-based cobalt phthalocyanine catalyst, which has the basic, oxidative bifunctional features can effectively catalyze the oxidation of 1-thiol. When these two When the molar ratio of cobalt phthalocyanine complex is 1, the catalytic activity is the highest and the stability is also improved obviously. The bifunctional catalyst system has the characteristics of enzyme catalysis, that is, follow the double substrate (1 C8H17SH and O2) Michaelis Menten kinetics law; apparent activation energy Ea = 5.04kJ · mol-1. In a certain range to improve the loading of binary cobalt phthalocyanine mixture, the unit of cobalt phthalocyanine center activity remained essentially constant, indicating that the formation of two The polymer complexes can inhibit the aggregation of cobalt phthalocyanine to some extent and improve the performance of the catalyst. Meanwhile, increasing the amount of Mg (Al) O support, that is, the number of alkali sites, is conducive to the increase of catalyst activity and stability. The new type of bifunctional catalyst has the prospect of industrial application.