纳米团簇
纳米材料基催化剂
催化作用
多孔性
材料科学
钯
化学工程
纳米颗粒
制作
结晶度
纳米技术
化学
有机化学
复合材料
病理
工程类
替代医学
医学
作者
Jinfang Kou,Wei Wang,Jian Fang,Feng Li,Huacheng Zhao,Jianfeng Li,Hanghang Zhu,Boyang Li,Zhengping Dong
标识
DOI:10.1016/j.apcatb.2022.121487
摘要
The precise size-controlled formation of palladium (Pd) nanoclusters with size-dependent catalytic activity was achieved through a cage confinement strategy. In this process, three typical porous organic cages (POCs) with gradually decreasing cavity diameters were used as encapsulation carriers. A series of Pd nanoclusters-based catalysts with corresponding Pd cluster sizes of 0.73, 0.68, and 0.43 nm, respectively, was effectively fabricated by confining the Pd nanoclusters in size-adjustable cavities. The obtained [email protected] nanocatalysts exhibited excellent crystallinity, high stability, fascinating morphological characteristics, and superior catalytic hydrogenation performance. Especially, the size-dependent catalytic performance toward hydrogenation of 4-nitrophenol and semi-hydrogenation of alkyne compounds was demonstrated by experimental results and theoretical calculations. The prepared Pd(1.71%)@FT-RCC3 catalyst with the smallest Pd cluster size of about 0.43 nm showed the best catalytic performance. This study promotes a better understanding of size-dependent catalysis and provides a new strategy for the fabrication of customized nanocatalysts.
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