1 research outputs found
Solvent-Assisted Oxygen Incorporation of Vertically Aligned MoS<sub>2</sub> Ultrathin Nanosheets Decorated on Reduced Graphene Oxide for Improved Electrocatalytic Hydrogen Evolution
Three-dimensional
oxygen-incorporated MoS<sub>2</sub> ultrathin
nanosheets decorated on reduced graphene oxide (O-MoS<sub>2</sub>/rGO)
had been successfully fabricated through a facile solvent-assisted
hydrothermal method. The origin of the incorporated oxygen and its
incorporation mechanism into MoS<sub>2</sub> were carefully investigated.
We found that the solvent <i>N</i>,<i>N</i>-dimethylformamide
(DMF) was the key as the reducing agent and the oxygen donor, expanding
interlayer spaces and improving intrinsic conductivity of MoS<sub>2</sub> sheets (modulating its electronic structure and vertical
edge sites). These O dopants, vertically aligned edges and decoration
with rGO gave effectively improved double-layer capacitance and catalytic
performance for hydrogen evolution reaction (HER) of MoS<sub>2</sub>. The prepared O-MoS<sub>2</sub>/rGO catalysts showed an exceptional
small Tafel slope of 40 mV/decade, a high current density of 20 mA/cm<sup>2</sup> at the overpotential of 200 mV and remarkable stability even
after 2000th continuous HER test in the acid media