Single-atomic platinum on fullerene C 60 surfaces for accelerated alkaline hydrogen evolution.

The electrocatalytic hydrogen evolution reaction (HER) is one of the most studied and promising processes for hydrogen fuel generation. Single-atom catalysts have been shown to exhibit ultra-high HER catalytic activity, but the harsh preparation conditions and the low single-atom loading hinder their practical applications. Furthermore, promoting hydrogen evolution reaction kinetics, especially in alkaline electrolytes, remains as an important challenge. Herein, Pt/C 60 catalysts with high-loading, high-dispersion single-atomic platinum anchored on C 60 are achieved through a room-temperature synthetic strategy. Pt/C 60 -2 exhibits high HER catalytic performance with a low overpotential (η 10 ) of 25 mV at 10 mA cm -2 . Density functional theory calculations reveal that the Pt-C 60 polymeric structures in Pt/C 60 -2 favors water adsorption, and the shell-like charge redistribution around the Pt-bonding region induced by the curved surfaces of two adjacent C 60 facilitates the desorption of hydrogen, thus favoring fast reaction kinetics for hydrogen evolution.