Fig. 7From: Hydrogen production from water electrolysis: role of catalysts(Figure reprinted with permission from Ref. [41])NiCo2PX catalyst: a HER performance in 1Â M KOH and PBS and 0.5Â M H2SO4, b SEM images before and after HER long-term stability test in different media, c schematic illustration of water dissociation over NiCo2PX in alkaline solutionBack to article page