d-Ti3C2 /MoS2 Composite for Efficient Electrocatalytic Hydrogen Evolution

MXenes, a two-dimensional material, is an emerging research area. Herein, a d-Ti3C2 MXene was combined with MoS2 nanoballs to achieve better electrocatalytic performance for hydrogen evolution reaction (HER). The synthesized d-Ti₃C₂/MoS₂ composite showed outstanding kinetic metrics for electrocatalytic HER, exhibiting a low overpotential of 45 mV at a current density of 10 mA/cm² compared to d-Ti₃C₂ MXene (180 mV) and MoS₂ nanoballs (140 mV). Long-term stability was verified for 24 h with a negligible loss in current density. The high electrocatalytic performance of d-Ti₃C₂/MoS₂ composite is believed to be originated from a synergistic effect between d-Ti₃C₂ MXene and MoS₂ nanoballs as well as high metallic conductivity of d-Ti₃C₂ MXene. It was concluded that the proposed synthesized composite provides insights for fabricating new cost-effective non-noble metal-based electrocatalysts with efficient water-splitting.