Fig. 6

Overall water splitting performance. a Digital image of the water splitting test conducted with three-electrode configuration by using Ag/AgCl reference electrode. b Polarization I–V profiles of various catalysts measured in deaerated 1 M KOH. c Chronopotentiometric stability profiles measured at 100 mA cm–2 for 1000 h. d Comparison of the overall water electrolysis stability of various catalysts reported in the literature