(ZnO) 3 with GO models shows similar hydrolysis reaction pathways as in bare (ZnO) 3 . GO1, GO2, and GO4 models have two different hydrolysis reaction pathways whereas GO5 has 3 different hydrolysis reaction pathways. All the transition states in both singlet and triplet states are calculated using the Berny algorithm. The transition states have only one negative frequency as shown in the relative tables. The low activation energy barriers interpret the lower impact of the hydrolysis reaction pathway for the rate-determining step of the watersplitting reaction.