Synergetic Effect and Phase Engineering by Formation of Ti(3)C(2)T(x) Modified 2H/1T-MoSe(2) Composites for Enhanced HER

The typical semi conductivity and few active sites of hydrogen evolution of 2H MoSe(2) severely restrict its electrocatalytic hydrogen evolution performance. At the same time, the 1T MoSe(2) has metal conductivity and plentiful hydrogen evolution sites, making it feasible to optimize the electrocatalytic hydrogen evolution behavior of MoSe(2) using phase engineering. In this study, we, through a simple one-step hydrothermal method, composed 1T/2H MoSe(2), and then used newly emerging transition metal carbides with several atomic-layer thicknesses Ti(3)C(2)T(x) to improve the conductivity of a MoSe(2-)based electrocatalyst. Finally, MoSe(2)@Ti(3)C(2)T(x) was successfully synthesized, according to the control of the additional amount of Ti(3)C(2)T(x), to form a proper MoSe(2)/ Ti(3)C(2)T(x) heterostructure with a better electrochemical HER performance. As obtained MoSe(2)@4 mg-Ti(3)C(2)T(x) achieved a low overpotential, a small Tafel slope and this work offers additional insight into broadened MoSe(2) and MXenes-based catalyst’s electrochemical application.