A unipolar pulse electro-deposition (UPED) method is used to prepare nanosheet Co3O4 film on a carbon rod substrate in aqueous solution and compared with other conventional methods, i.e., the cyclic voltammetry (CV) method, potentiostatic method (PM) and pulse potentiostatic method (PPM). Co3O4 films prepared by the UPED method show a more uniform structure on carbon rod and higher catalytic activity than those by other methods, and oxygen evolution reaction over it with an overpotential of 275 ± 2.3 mV results in a current density of 10 mA cm-2 in 1.0 mol L-1 KOH. Such an excellent performance should be attributed to its highly porous nanosheet structure with honeycomb-like morphology.
ASJC Scopus subject areas
- Chemical Engineering(all)