Easy incorporation of single-walled carbon nanotubes into two-dimensional MoS2 for high-performance hydrogen evolution

Abstract

The limited intrinsic conductivity of two-dimensional (2D) MoS2 nanosheets compromises its high electrocatalytic performance. In this work, we develop a facile method of simply dispersing MoS2 nanosheets into a water–isopropanol solution of high-conducting single-walled carbon nanotubes (SWCNTs) for preparation of MoS2/SWCNT composites. The SWCNTs in the hybrid system serve as effective electron transport channels among 2D MoS2 nanosheets and facilitate charge transfer at the catalyst–electrolyte interface. We investigated the influence of SWCNTs ratios on the catalytic activities and obtained a high-performance hybrid catalyst with a low Tafel slope of 40.82 mV/decade and prominent electrochemical durability. The demonstration of our hybrid electrocatalytic system, with its scalable capacity for facile preparation, provides a new pathway to enhance HER activity.