Monocrystalline
Figure 1. Local electrocatalytic and photoelectrochemical activity of monocrystalline TMDs. (a) HER on a mechanically-exfoliated natural molybdenite crystal (2H–MoS 2) surface, showing enhanced electrocatalytic activity at step edges. (i) Electrochemical map (scan area = 45 × 45 μm 2; hopping distance = 1 μm) obtained at −1.05 V vs. RHE in a 0.1 M HClO 4 …