Charge redistribution within platinum–nitrogen coordination structure to boost hydrogen evolution

摘要: Abstract The manipulation of central atom coordination environments can greatly boost catalytic performances and promote the understanding associated mechanisms in both sub-nanometer clusters atomically dispersed catalysts. In this study, “raft”-like PtNx were synthesized on a TiO2 support, significant enhancement effects Pt–N structure performance hydrogen evolution reaction (HER) are demonstrated. acidic media, catalyst display superior HER activity (37.5 A mg-1 Pt) turnover frequencies (37.9H2 s-1) at overpotential 50 mV; outperforming commercial Pt/C by factor 13.3 3.9, respectively. Density functional theory (DFT) calculation results reveal that charge transfer occur from N to neighboring Pt atoms when is adsorbed atoms; such redistribution within leads smaller H* free energies activated atoms, believed account for higher activity.