A novel electrocatalyst,Ni-Co/β-Mo2C@C,was rationally designed to enhance the efficiency of the hydrogen evolution reaction(HER)in this work.Assembled with two-dimensional Ni-Co nanosheets onto Mo2C nanorods coated with a thin carbon shell,the catalyst demonstrates remarkable performance,including low overpotential(η10=57 mV)and reduced Tafel slope(63 mV·dec-1)in 0.5 mol·L-1 H2SO4 electrolyte.This innovative design strategy provides abundant active sites and efficient electron/ion transport pathways,effec-tively shortening reactant diffusion distances and enhancing electrocatalytic activity.Additionally,the carbon shell coating protects the catalyst from etching and agglomeration,ensuring its durability.This work presents a promising approach for engineering highly effi-cient metal carbide-based HER catalysts through tailored composition and nanostructure design.
Multiscale structureNanorodsMolybdenum carbideNi-Co dopingSupport-metal strong interactionNon-noble metal elec-trocatalystHydrogen evolution reactionAcidic media
Xiao Zhang、Yanan Diao、Huizhu Cai、Jiancong Fang、Bingbing Chen、Mingshu Bi、Chuan Shi
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State Key Laboratory of Fine Chemicals,School of Chemistry,Dalian University of Technology,Dalian,Liaoning 116024,China
State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China
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