Overall, our results show that depositing MoS 2 QDs on NiFeCo-LDH results in a very stable and active OER (photo)electrocatalyst. The EIS results show that the MoS 2 QDs reduce the transfer resistance, which indicates that the QDs enhance the OER kinetics. The addition of MoS 2 QDs also reduces the Tafel slope and changes the RDS from *O to *OOH formation.