Building 3D Crosslinked Graphene-MXene Nanoarchitectures Decorated with MoS Quantum Dots Enables Efficient Electrocatalytic Hydrogen Evolution.

Although MoS quantum dots with abundant edge sites have been regarded as promising eletrode materials for the hydrogen evolution reaction (HER), their electrocatalytic capacity still requires improvements in actual applications. Herein. we demonstrate a controllable and robust bottom-up approach to build 3D crosslinked graphene-TiCT MXene frameworks decorated with MoS quantum dots (MQD/RGO-MX) via a convenient co-assembly process. The novel structural design gives the MQD/RGO-MX nanoarchitectures a series of superior textural attributes, including 3D interconnected networks, continuous meso- and macropores, well-dispersed quantum dots, ameliorative electronic configuration, and excellent electrical conductivity. Accordingly, the resulting hybrid nanoarchitectures express superior electrocatalytic properties in terms of a low onset potential of only 45 mV, a small Tafel slope of 61 mV dec as well as a long service life towards the HER, which make it quite competitive against bare MoS quantum dots, MXene as well as binary MQD/RGO and MQD/MXene electrocatalysts.