Rare earth metal (Sm)-doped NiMnO nanostructures for highly competent alkaline oxygen evolution reaction.

In the present work, samarium-doped nickel manganese oxide was produced by employing a straightforward co-precipitation method. A peak with a 2 of 36° corresponded to the (110) plane confirming the formation of the rhombohedral crystal structure of NiMnO. The existence of Mn-O and Ni-O stretching vibration modes was confirmed by Raman spectroscopy.