沸石
催化作用
腈
选择性
化学
纳米颗粒
胺气处理
氨
多相催化
化学工程
组合化学
有机化学
材料科学
纳米技术
工程类
作者
Qiqi Lu,Xiu‐Zhi Wei,Jianguo Liu,Longlong Ma
标识
DOI:10.1016/j.micromeso.2022.112086
摘要
Zeolite-tailored encapsulation of metal nanoparticles exhibits prominent catalytic performance in many fields especially for selective hydrogenation reaction due to the modulation effect of the zeolite microenvironment. Here, Pd nanoparticles encapsulated in MFI zeolite by an in-situ encapsulation method were first used in the selective hydrogenation of nitrile into a primary amine. After introducing KOH for mediating the acid-base property of zeolite microenvironment, the as-synthesized [email protected] manifested an improved selectivity in the synthesis of primary amine from nitrile, while outperformed both commercial catalysts and conventional Pd supported on zeolite catalyst. The remarkable performance of [email protected] could be attributed to both the basic property of the S-1-K zeolite for inhibiting the side reactions and the highly dispersed and ultrasmall Pd clusters for superior catalytic activity. Besides, the best yield of 81% was achieved at 80 °C, 5 bar H2, 2 h in ammonia solution via optimization experiments, and the moderate applicability of [email protected] catalyst was obtained by substrate scope test.
科研通智能强力驱动
Strongly Powered by AbleSci AI