Tuesday, November 27, 2012

Direct Synthesis of Bimetallic Pd3Ag Nanoalloys from Bulk Pd3Ag Alloy

In the article of the ACS “Direct Synthesis of Bimetallic Pd3Ag Nanoalloys from Bulk Pd3Ag Alloy”, it is reported a transformative, all inorganic synthesis method of preparing supported bimetallic Pd3Ag alloy nanoparticles. The method involves breaking down bulk Pd3Ag alloy into the nanoparticles in liquid lithium, converting metallic Li to LiOH, and transferring Pd3Ag nanoparticles/LiOH mixture onto non-water-soluble supports, followed by leaching off the LiOH with water under ambient conditions. The size of the resulting Pd3Ag nanoparticles was found narrowly distributed around 2.3 nm characterized by transmission electron microscope (TEM). In addition, studies by X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS) spectroscopy, and X-ray absorption near edge structure (XANES) spectroscopy showed that the resulting Pd3Ag nanoparticles inherited similar atomic ratio and alloy structure as the starting material. The synthesized Pd3Ag nanoparticles exhibited excellent catalytic activity toward hydrogenation of acrolein to propanal.
Abstract Image

Chi-Kai Lin, Yan-Gu Lin, Tianpin Wu, Heather M. Barkholtz, Qiyin Lin, Haojuan Wei, Dale L. Brewe, Jeffrey T. Miller, Di-Jia Liu, Yang Ren, Yasuo Ito, Tao Xu. (2012). Direct Synthesis of Bimetallic Pd3Ag Nanoalloys from Bulk Pd3Ag Alloy.  Journal Of The American Chemical Society, DOI: 10.1021/ic301940g

1 comment:

preeti said...

Nanoalloy is used in ornaments.

¿Cómo es la cuarta dimensión? Mientras se daba en clase el tema "simetría molecular", llegamos al tema de la cuarta dimensión....