Confined Growth of MoS2 by using a Two‐Dimensional Metal‐Organic Framework for Efficient Hydrogen Evolution

Abstract Molybdenum disulfide (MoS 2 ) is a promising electrocatalyst for hydrogen evolution reaction (HER). However, the exposed active edge sites of MoS 2 are limited due to its intrinsic stacking property. Herein, a highly exposed MoS 2 hybrid electrocatalyst is prepared by a confined strategy of the pores of a 2D metal‐organic framework (MOF). A low overpotential of 76 mV at 10 mA cm −2 and a Tafel slope of 73 mV dec −1 are achieved, which indicated greater efficiency than pristine MoS 2 . The denotative growth of MoS 2 from the internal pore of 2D MOF on the surface effectively prevents its stacking and exposes much more active edge sites. Experimental results show that parts of Co are incorporated into MoS 2 , producing strong electronic interaction between Co and Mo atoms and accounting for the excellent HER activity of MoS 2 . This work demonstrates a confined strategy to prepare nanomaterials with highly exposed edge sites and enhanced intrinsic activity.