纳米结构
催化作用
材料科学
钯
纳米颗粒
八面体
化学工程
卤化物
纳米技术
离子
无机化学
化学
有机化学
工程类
作者
Xiao Wang,Yibo Zhang,Shuyan Song,Xiangguang Yang,Zhuo Wang,Rongchao Jin,Hongjie Zhang
标识
DOI:10.1002/anie.201600625
摘要
Abstract Pd@CeO 2 core–shell nanostructures with a tunable Pd core size, shape, and nanostructure as well as a tunable CeO 2 sheath thickness were obtained by a biomolecule‐assisted method. The synthetic process is simple and green, as it involves only the heating of a mixture of Ce(NO 3 ) 3 , l ‐arginine, and preformed Pd seeds in water without additives. Importantly, the synthesis is free of thiol groups and halide ions, thus providing a possible solution to the problem of secondary pollution by Pd nanoparticles in the sheath‐coating process. The Pd/CeO 2 nanostructures can be composited well with γ‐Al 2 O 3 to create a heterogeneous catalyst. In subsequent tests of catalytic NO reduction by CO, Pd@CeO 2 /Al 2 O 3 samples based on Pd cubes (6, 10, and 18 nm), Pd octahedra (6 nm), and Pd cuboctahedra (9 nm) as well as a simply loaded Pd cube (6 nm)–CeO 2 /Al 2 O 3 sample were used as catalysts to investigate the effects of the Pd core size and shape and the hybrid nanostructure on the catalytic performance.
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