Influence of surface terminal groups on the efficiency of two-electron oxygen reduction reaction catalyzed by iron single atoms on Ti3C2Tx (T = Cl, Br, NH) MXene

Oxygen reduction electrocatalysis is studied for three Ti 3 C 2 T x MXenes (T = Cl, Br, NH) having single atom Fe, prepared from a Ti 3 AlC 2 precursor by the Lewis acid molten salt etching method using FeX 2 (X = Cl, Br), and surface modification with LiNH 2 .