Nonlayered 2D ultrathin molybdenum nitride synthesized through the ammonolysis of 2D molybdenum dioxide.

We report a new scalable strategy for the synthesis of nonlayered ultrathin two-dimensional (2D) molybdenum nitride (MoN) on a SiO2/Si substrate by converting 2D molybdenum dioxide (MoO2) through an ammonolysis process. The edge of MoN shows higher performance than that of the basal plane in both acidic and alkaline solutions.