Chemical Fluid Deposition of Monometallic and Bimetallic Nanoparticles on Ordered Mesoporous Silica as Hydrogenation Catalysts

Overview

Title: 

Chemical Fluid Deposition of Monometallic and Bimetallic Nanoparticles on Ordered Mesoporous Silica as Hydrogenation Catalysts

Abstract: 

A simple and green method of depositing monometallic (Ru, Rh, Pd) and bimetallic nanoparticles (Ru-Rh, Ru-Pd and Rh-Pd) on an ordered mesoporous silica support (MCM-41) in supercritical carbon dioxide (scCO(2)) is described. Metal acetylacetonates were used in the experiments as CO(2)-soluble metal precursors. Suitable temperature and pressure conditions for synthesizing each kind of nanoparticles were applied in this study. The characterizations of these nanocomposites were performed by transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). The nanoparticles had average sizes varying from 2 nm to 8 nm. The Ru nanoparticles were clearly shown to be inside the mesopores of MCM-41 from the TEM image. These nanocomposites used as catalysts for hydrogenation was demonstrated. The efficiency of the scCO(2) prepared Ru/MCM-41 catalyst was nearly 8 times than that of a Ru/MCM-41 catalyst prepared by conventional impregnation method.

Authors: 

Clive H. Yen, Hsin Wei Lin, The Duy Phan, Chung-Sung Tan

DOI: 

Journal: 

Journal Of Nanoscience And Nanotechnology

Year: 

2011

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