RDE Evaluation of PtxCo Alloy Nanoparticles

Overview

Tested and interpreted novel platinum cobalt nanoparticles. Used ICP-MS, TEM imaging, and electrochemical characterization to quantify activity improvements through the addition of cobalt.

Approach

• Catalysts were synthesized and checked for platinum and cobalt content with hydrometallurgy and ICP-MS; TEM imaging showed uniform particle size.
• Activity was evaluated with RDE voltammetry (CV, LSV and CO stripping) in a three-electrode cell in perchloric acid.

Findings

• Catalysts with higher cobalt content had a H_upd/CO ratio closer to 1.5 and higher ORR activity, indicating a platinum skin.
• Controlling particle size and composition as variables allows further study of Pt-skin catalysts.