In the just published paper by S. Ghosh et al presented the results of the study of molecularly derived nickel sulfide NiS pre-catalysts for the electro-oxidation of water, also in alkaline solution, t o ox ygen. NiS is transformed into the carbonate-intercalated phase γ-NiOOH , which catalyzes with high efficiency the el ect r oox ida t ion of a lcohols .