A porous Ni-O/Ni/Si photoanode for stable and efficient photoelectrochemical water splitting

Excellent photoelectrochemical activity was demonstrated for an easily prepared porous Ni-O/Ni/Si photoanode with an onset potential of 0.93 VRHE, a photocurrent of 39.7 mA cm−2 at 1.23 VRHE, an energy conversion efficiency of 3.2% and a stability above 100 h.