Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (03): 334-338.DOI: 10.6023/A12110977 Previous Articles     Next Articles

Article

包钯纳米颗粒的中空介孔硅铝酸盐纳米球的合成及其在多步催化反应和尺寸选择催化氢化中的应用

刘召辉, 方晓亮, 陈诚, 郑南峰   

  1. 厦门大学化学化工学院 固体表面物理化学国家重点实验室 厦门 361005
  • 收稿日期:2012-11-28 出版日期:2013-03-14 发布日期:2013-01-11
  • 通讯作者: 郑南峰 E-mail:nfzheng@xmu.edu.cn
  • 基金资助:

    项目受到科技部国家纳米重大科学研究计划(No.2011CB932403)、国家自然科学基金(Nos.21131005,21021061,20925103,20923004)和霍英东教育基金会青年教师基金(No.121011)资助.

Pd Nanoparticles Encapsulated in Hollow Mesoporous Aluminosilica Nanospheres as an Efficient Catalyst for Multistep Reactions and Size-Selective Hydrogenation

Liu Zhaohui, Fang Xiaoliang, Chen Cheng, Zheng Nanfeng   

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
  • Received:2012-11-28 Online:2013-03-14 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.

Key words: reverse micelle, core-shell structure, yolk-shell structure, palladium, multifunctional nanocatalyst, size-selective catalysis, hydrogenation