Fig. 4

ORR characterization of the prepared Ti3C2, Ni/Co-MOF@Ti3C2, Ni/Co-MOF and Co-MOF. (a) ORR polarization curves. (b) Tafel plot and (c) power density curves of Ni/Co-MOF@Ti3C2. (d) ORR LSV curves of Ni/Co-MOF@Ti3C2 at different speeds.

ORR characterization of the prepared Ti3C2, Ni/Co-MOF@Ti3C2, Ni/Co-MOF and Co-MOF. (a) ORR polarization curves. (b) Tafel plot and (c) power density curves of Ni/Co-MOF@Ti3C2. (d) ORR LSV curves of Ni/Co-MOF@Ti3C2 at different speeds.