Abstract
Noble metal-based electrocatalysts have been demonstrated significant efficiency in the production of hydrogen. However, the sluggish kinetics of the hydrogen evolution reaction (HER) in alkaline media due to high water dissociation energy greatly hinders this electrochemical process. Here, we report a RuMo nanoalloy electrocatalyst mounted on a nitrogen-doped carbon skeleton (RuMo@NC). The RuMo@NC catalyst exhibits excellent HER performance in both alkaline and acidic media, displaying small overpotentials of 18 mV and 14 mV for driving the current density of 10 mA⊡cm−2, respectively. This performance surpasses the majority of noble metal electrocatalysts and 20 % commercial Pt/C. Theoretical calculations reveal that the interaction between Ru and Mo results in a modification of the electronic structure. Consequently, this interaction effectively weakens the adsorption energy of hydrogen on the surface of the RuMo alloy, ultimately improving its catalytic performance in the hydrogen evolution reaction. This work offers new ways to design efficient and economical HER electrocatalysts, advancing the exploration of HER catalysts.
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