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Updated: Apr 25, 2026
A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles
Published on: April 10, 2019
Novel electrochemical fingerprinting methods for the precise determination of Pt(shell) coverage on Ru(core)
Ehab N El Sawy1, Hany A El-Sayed, Viola I Birss
1Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4. birss@ucalgary.ca.
Abstract:
The surface composition of nanoparticles is critical in defining their chemical and electrochemical properties. However, there are a limited number of tools that can rapidly and reliably establish these important characteristics at this small scale. In the present work, a series of Rucore@Ptshell nanoparticles (2 or 3 nm diameter Ru core, 0 to 2 monolayers of Pt in the shell layer) were synthesized and several novel electrochemical fingerprinting methods were developed to determine the Pt shell characteristics. These involved tracking the charge associated with the reduction of the oxide film formed on the exposed Rucore, as well as the potential and charge associated with COads stripping, giving the precise coverage of the first and second Pt monolayer, respectively.
