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Journal Article
Research Support, Non-U.S. Gov't
Molybdenum Disulfide-Black Phosphorus Hybrid Nanosheets as a Superior Catalyst for Electrochemical Hydrogen Evolution.
Nano Letters 2017 July 13
Engineering electronic properties is a promising way to design nonprecious-metal or earth-abundant catalysts toward hydrogen evolution reaction (HER). Herein, we deposited catalytically active MoS2 flakes onto black phosphorus (BP) nanosheets to construct the MoS2 -BP interfaces. In this case, electrons flew from BP to MoS2 in MoS2 -BP nanosheets because of the higher Fermi level of BP than that of MoS2 . MoS2 -BP nanosheets exhibited remarkable HER performance with an overpotential of 85 mV at 10 mA cm-2 . Due to the electron donation from BP to MoS2 , the exchange current density of MoS2 -BP reached 0.66 mA cm-2 , which was 22 times higher than that of MoS2 . In addition, both the consecutive cyclic voltammetry and potentiostatic tests revealed the outstanding electrocatalytic stability of MoS2 -BP nanosheets. Our finding not only provides a superior HER catalyst, but also presents a straightforward strategy to design hybrid electrocatalysts.
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