化学
纳米尺度
纳米晶
催化作用
纳米技术
纳米颗粒
钯
Crystal(编程语言)
化学工程
有机化学
材料科学
工程类
计算机科学
程序设计语言
作者
Dongling Wang,Chengchao Zhang,Lichun Zhang,Xiaobin Xie,Yi Lv
出处
期刊:Inorganic Chemistry
[American Chemical Society]
日期:2023-12-28
卷期号:63 (2): 1247-1257
被引量:3
标识
DOI:10.1021/acs.inorgchem.3c03635
摘要
Tuning the surface chemical property and the local environment of nanocrystals is crucial for realizing a high catalytic performance in various reactions. Herein, we aim to elucidate the structure sensitivity of Pd facets on the surface catalytic hydrogenation reaction and to identify what role the nanoconfinement effect plays in the catalytic properties of Pd nanocrystal catalysts. By controlling the coating structures of mesoporous silica (mSiO2) on Pd nanocrystals with different exposed facets that include {100}, {111}, and {hk0}, we present a series of Pd@mSiO2 nanoreactors in core–shell and yolk–shell structures and the discovery of a partial-coated structure, which can provide different types of nanoconfinement, and we propose a seed size-dominated growth mechanism. We demonstrate that a superior activity was exhibited in Pd nanocrystals enclosed by the {hk0} facet as compared to the Pd{100} and Pd{111} facets, and substantially enhanced efficiency and stability were achieved in Pd@mSiO2 particles with yolk–shell structures, indicating a crucial superiority of optimizing the configuration of crystal facets and nanoconfinement. Our study provides an efficient strategy to rationally design and optimize nanocatalysts for promoting catalytic performance.
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