Abstract
AbstractIncreasing the active edge sites of molybdenum disulfide (MoS2) is an efficient strategy to improve the overall activity of MoS2 for the hydrogen‐evolution reaction (HER). Herein, we report a strategy to synthesize the ultrasmall donut‐shaped Cu7S4@MoS2 hetero‐nanoframes with abundant active MoS2 edge sites as alternatives to platinum (Pt) as efficient HER electrocatalysts. These nanoframes demonstrate an ultrahigh activity with 200 mA cm−2 current density at only 206 mV overpotential using a carbon‐rod counter electrode. The finding may provide guidelines for the design and synthesis of efficient and non‐precious chalcogenide nanoframe catalysts.
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