Dual Pt-Ni atoms dispersed on N-doped carbon nanostructure with novel (NiPt)-N4C2 configurations for synergistic electrocatalytic hydrogen evolution reaction

Single-atom catalysts with high atomic utilization efficiency, well-defined active centers, and catalytic sites low coordination numbers are promising to boost electrocatalytic performance. Dual-atom (DACs) neighboring heteroatoms expected exert the synergistic effect of two atoms, further improving activity. Herein, we report a PtNi-NC catalyst consisting PtNi dual atoms anchored on nitrogen-doped carbon substrate synthesized through layer deposition. X-ray absorption spectroscopy confirms existence atoms. The as-prepared exhibits extraordinary activity, an overpotential 30 mV for hydrogen evolution reaction (HER) in acidic media at current density 10 mA cm−2, which is comparable that commercial 20 wt% Pt/C. Notably, possesses much higher mass about 21 times, than Density functional theory calculations reveal generate by modulating local electronic structure optimizing charge distribution, contributing optimized adsorption properties enhanced This work provides new avenue fabrication DACs, revealing their potential applications HER beyond.