Electrophoretic Deposition of Cobalt Ferrite and Platinum Cobalt Nanoparticles as Electrocatalysts

Abstract

Cobalt ferrite and platinum cobalt nanoparticles were deposited using electrophoretic deposition (EPD) from two different bath chemistries. The first bath contained 2 g/L particles suspended in 90 vol.% water and 10 vol.% isopropanol with 0.4 g/L hexadecyltrimethlyammonium bromide. The second bath contained 2 g/L particles suspended in 100 % ethanol. The deposits were tested for electrocatalytic properties for the oxidation of ammonium sulfite to ammonium sulfate. Linear sweep voltammetry showed that both EPD deposits of cobalt ferrite and platinum cobalt nanoparticles had electrocatalytic activity.