Carbon Quantum Dots Modulated NiMoP Hollow Nanopetals as Efficient Electrocatalysts for Hydrogen Evolution

Although non-noble metals are extensively studied towards hydrogen evolution reaction (HER) because of their intrinsic electrocatalytic performances, while their practical applications have been hindered by their low conductivity, unsatisfactory activity, and poor stability. In order to approach the practical applications, it is important to improve their electrocatalytic activity and stability. Herein, we reported the fabrication of hollow NiMoP nanopetals embedded with N-doped CDs by a simple hydrothermal method. The addition of CDs can effectively modulate the morphology, reduce aggregation, boost abundant active sites and keep long-time stability. The optimal Ni5Mo3P@CDs3 exhibits excellent HER performance, in terms of a low overpotential of 183 mV at 10 mA cm-2, small Tafel slope of 41.04 mV dec-1, high conductivity, large electrochemical active surface area (ECSA) of 117.7 m2 and remarkable long-term stability in acidic media for HER. This work opens an effective avenue to construct excellent proper...