Improvement of hydrogen evolution catalytic performance of MoS2 nanoflowers by constructing MoS2/MXene Ti3C2 heterostructure petals

In this paper, we report a special [Formula: see text] nanoflower synthesized by hydrothermal approach, in which a heterostructure petal of [Formula: see text] [Formula: see text] is constructed by growing the [Formula: see text] active layers onto the few-layered MXene [Formula: see text] substrate. Compared with the pristine [Formula: see text] nanoflowers, the heterostructure [Formula: see text] nanoflowers exhibit a lower onset overpotential of 207 mV and a lower Tafel slope of 28 mV dec[Formula: see text]. This can be explained by the heterostructure [Formula: see text] nanoflowers providing a great number of exposed surfaces of [Formula: see text], and increasing more active sites, and strengthening the interlayer coupling between [Formula: see text] and MXene [Formula: see text] to accelerate the charge transfer. All the merits are beneficial to the performance enhancement for hydrogen evolution catalytic.