Engineering nickel vacancies in NiCo LDH nanoarrays accelerates hydrogen evolution and oxygen evolution reactions

NiCo LDH-V Ni /CC exhibits excellent HER and OER activities, requiring only 195 and 227 mV overpotentials to achieve a current density of 10 mA cm −2 in 1 M KOH, and sustained for 100 h with almost no degradation.