The exploration of low cost electrocatalyst with comparable catalytic activity and kinetics to the expensive noble metal catalysts for hydrogen evolution reaction (HER) is still the most urgent challenge. Herein, a facile strategy to synthesize Ti₃C₂T_x MXene by ultrasonication with controlled N-doping is reported. The surface modification of MXene can be achieved by the formation of TiN chemical bonds at an optimized ultrasonic temperature, which will further enhance the HER activity. Specifically, at the ultrasonic temperature of 35 °C, the N-doped MXene (N-MXene-35) exhibits the highest concentration of TiN bond, delivering an extraordinary HER activity with an overpotential of 162 mV (vs. the reversible hydrogen electrode, RHE) at the current density of 10 mA cm⁻² in acid media, which is 3.5 times lower than that of the pristine MXene (578 mV vs. RHE). As expected, the obtained N-MXene-35 affords the best HER electrocatalytic performance among the MXene or N-doped MXene electrode as so far reported.

迫在眉睫的是，寻找与氢贵化反应（HER）昂贵的贵金属催化剂具有可比的催化活性和动力学的低成本电催化剂仍然是最紧迫的挑战。在本文中，报道了通过在受控的N-掺杂下通过超声合成Ti ₃ C ₂ T _x MXene的简便策略。MXene的表面改性可通过在最佳超声温度下形成Ti N化学键来实现，这将进一步增强HER活性。具体而言，在35°C的超声温度下，N掺杂的MXene（N -MXene-35）表现出最高的Ti浓度。N键，在酸性介质中的电流密度为10 mA cm ^-2时，具有162 mV的超电势（相对于可逆氢电极，RHE），具有超电势，是原始MXene的3.5倍（ 578毫伏VS。RHE）。如预期的那样，到目前为止，所获得的N -MXene-35在MXene或N掺杂的MXene电极中提供了最佳的HER电催化性能。