| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 595516 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2010 | 5 Pages |
Abstract
Gold-ruthenium (Au-Ru) bimetallic nanoparticles were synthesized by the sonochemical co-reduction of Au(III) and Ru(III) ions in aqueous solutions containing varying mole fractions (1:1, 1:3 and 1:5) of the metal ions using PEG as a stabilizer. The results observed in the current study suggest that the presence of Au nanoparticles significantly reduced the time required from 7Â h to 4Â h for Ru3+ reduction due to the Au nanoparticles acting as electron sink mediating the Ru3+ reduction process. Transmission electron microscopic images revealed that the bimetallic nanoparticles were formed with higher ruthenium content in the shell and higher gold content in the core. The mean diameter of Au-Ru bimetallic nanoparticles increased with an increase in the molar ratio of Ru. A decrease in the double layer current was observed when a Au-Ru bimetallic nanoparticles modified electrode was used in electrochemical experiments compared to a Ru-modified electrode, indicating the potential use of these bimetallic nanoparticles in methanol oxidation fuel cells.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Panneer Selvam Sathish Kumar, Arumugam Manivel, Sambandam Anandan, Meifang Zhou, Franz Grieser, Muthupandian Ashokkumar,