Inducing a Synergistic Effect on Pt/Electron-Rich Sites via a Platinization Strategy: Generating Hyper-High Current Density in Hydrogen Evolution Reaction.

Herein, we propose a platinization strategy for the preparation of Pt/X catalysts with low Pt content on substrates possessing electron-rich sites (Pt/X: X = CoO, NiO, CeO, Covalent Organic Framework (COF), etc.). In examples with inorganic and organic substrates, respectively, Pt/CoO possesses remarkable catalytic ability toward HER, achieving a current density at an overpotential of 500 mV that is 3.