Iridium nanoparticles anchored on 3D graphite foam as a bifunctional electrocatalyst for excellent overall water splitting in acidic solution

The proton exchange membrane (PEM) water splitting electrolyser is a highly appealing technology for economical hydrogen production. Here we report a novel bifunctional overall water splitting electrocatalyst, namely Ir nanoparticles supported by 3D graphite foam (Ir/GF). In acidic solution, the Ir/GF exhibits excellent HER and OER activities with extremely low overpotentials of only ~ 7 and ~ 290 mV at 10 mA/cm2, respectively.164