Fig. 7: Chronoamperometry (CA) stability testing.

a CA comparing BiVO4 with 0.125 mM precursor solution (AACVD + ET)-CoPi and 600-s cycles (PED)-CoPi coatings at an applied potential of 1.23 VRHE, b) J–V curves comparing (AACVD + ET)-CoPi before and after stability testing, and c before and after photographs of the samples tested in a) over 4 h.