Pd Nanoparticles Encapsulated in Hollow Mesoporous Aluminosilica Nanospheres as an Efficient Catalyst for Multistep Reactions and Size-Selective Hydrogenation
Received date: 2012-11-28
Online published: 2013-01-11
Supported by
Project supported by the Ministry of Science and Technology of China (No. 2011CB932403), the National Natural Science Foundation of China (Nos. 21131005, 21021061, 20925103, 20923004), and the Fok Ying Tung Education Foundation (No. 121011).
In this work, yolk-shell structured Pd@hollow mesoporous aluminosilica nanospheres (designated as Pd@HMAN) have been successfully fabricated by a straightforward synthetic route. Core-shell Pd@SiO2 nanospheres were firstly obtained by silica coating of in-situ synthesized Pd nanoparticles in a Brij56-cyclohexane-water reverse micelle system. Simply by alkaline etching of as-prepared Pd@SiO2 core-shell nanospheres in the presence of CTAB, Na2CO3 and NaAlO2, Pd@HMAN particles with high porosity were obtained. As the mesoporous aluminosilica shells can serve as acid catalysts, and the Pd yolks can be applied to catalytic hydrogenation, the as-prepared Pd@HMAN can be used as a stable multifunctional catalyst for multistep reactions. Moreover, due to their adjustable pore parameters, Pd@HMAN after simple thermal treatment can be further applied in the size-selective hydrogenation.
Liu Zhaohui , Fang Xiaoliang , Chen Cheng , Zheng Nanfeng . Pd Nanoparticles Encapsulated in Hollow Mesoporous Aluminosilica Nanospheres as an Efficient Catalyst for Multistep Reactions and Size-Selective Hydrogenation[J]. Acta Chimica Sinica, 2013 , 71(03) : 334 -338 . DOI: 10.6023/A12110977
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