Silicalite-1 (S-1) encapsulated [email protected] ([email protected]) core-shell catalysts were prepared by using a seeds-induced growth strategy, including immobilization of Pd²⁺ on amino-functionalized S-1 seeds and regrowth of the S-1 zeolite. The microstructure and elemental composition of [email protected] core-shell catalysts were characterized by FE-SEM, TEM, XRD, XPS and ICP-AES. The results indicate Pd NPs are encapsulated and well dispersed in S-1 crystals and have a narrow size distribution of around 3.2 nm. This core-shell catalyst demonstrates excellent shape selectivity in the hydrogenation of alkenes compared with conventional Pd/S-1 obtained by directly loading Pd NPs on S-1 without regrowth.

Silicalite-1（S-1）封装的[受电子邮件保护]（[受电子邮件保护]）核壳催化剂是通过种子诱导的生长策略制备的，包括将Pd ²⁺固定在氨基官能化的S-1种子上并使其再生长S-1沸石。用FE-SEM，TEM，XRD，XPS和ICP-AES对[电子邮件保护的]核壳催化剂的微观结构和元素组成进行了表征。结果表明，Pd NPs被封装并很好地分散在S-1晶体中，并具有约3.2 nm的窄尺寸分布。与通过将Pd NPs直接负载在S-1上而无再生长而获得的常规Pd / S-1相比，该核-壳型催化剂在烯烃的氢化中表现出优异的形状选择性。