摘要
Developing renewable hydrogen technologies requires high-efficiency pH-universal hydrogen evolution reaction(HER)electrocatalysts.Ruthenium phosphides(RuPx)have great potentials to replace the commercial Pt-based materials,whereas the optimization of their electronic structure for favorable reaction intermediate adsorption remains a significant challenge.Herein,we report an innovative phosphorization-controlled strategy for the in-situ immobilization of core/satellite-structured RuP/RuP_(2)heteronanoparticles onto N,P co-doped porous carbon nanosheets(abbreviated as RuP/RuP_(2)@N/P-CNSs hereafter).Density functional theory(DFT)calculations further reveal that the electron shuttling at the RuP/RuP_(2)interface leads to a reduced energy barrier for H2O dissociation by electron-deficient Ru atoms in the RuP and the optimized H*adsorption of electron-gaining Ru atoms in the RuP_(2).Impressively,the as-synthesized RuP/RuP_(2)@N/P-CNSs exhibits low overpotentials of 8,29,and 66 mV to achieve 10 mA cm^(-2)in alkaline,acid and neutral media electrolyte,respectively.This research presents a viable approach to synthesize high-efficiency transition metal phosphide-based electrocatalysts and offers a deeper comprehension of interface effects for HER catalysis.
