Synthesis of CNT/Ru/Cobalt oxide composites as oxygen evolution reaction electrocatalysts via ball milling approach

Ruthenium (Ru) and Cobalt oxides (CoO) nanoparticles are uniformly decorated on surfaces of carbon nanotubes (CNTs), via ball milling of mixtures consisting of commercial CNTs, triphenylphosphine ruthenium chlorides and Cobalt nitrates. Due to collective contributions of Ru and CoO, the obtained CNT/Ru/CoO composites exhibit excellent electrocatalytic activities and durability for oxygen evolution reaction (OER), both of which outperform those of the state-of-the-art iridium oxide catalysts.