Ru atoms were uniformly loaded on the surface of self-assembled micrometer spheres of nitro-gen-doped ultrathin molybdenum carbide nanosheets by ion-exchange method,and the ratio of β-Mo2C and α-MoC1-x in Ru-MoxC NFs was adjusted by adjusting the content of ruthenium in the precursors,Ru-MoxC NFs-4 catalyst with excellent hydrogen precipitation performance was obtained,which exhibited very good hydrogen precipitation performance due to the better hydrogen adsorption energy of the mixed crystalline phase molybdenum carbide and the synergistic effect between Ru and Mo2C substrates.Ru-MoxC NFs-4 exhibited low overpotentials(η10=49 mV and η100=127 mV),a Tafel slope of 51.3 mV·dec-1,and good durability.This study provides a new idea for the design of efficient catalysts for hydro-gen evolution reaction by tuning the carbide phase composition through doping with metals.
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