fig5

From: Unveiling proton-regulated Mo=O/Mo-O^- centers in reconstructed Ni₂Mo-NiOOH/MoO_x interfaces toward accelerated proton-coupled electron transfer for urea oxidation reaction

Unveiling proton-regulated Mo=O/Mo-O<sup>-</sup> centers in reconstructed Ni<sub>2</sub>Mo-NiOOH/MoO<sub>x</sub> interfaces toward accelerated proton-coupled electron transfer for urea oxidation reaction

Figure 5. Effects of different concentrations of MoO₄^2- and Ni²⁺ in the electrolyte on the UOR electrocatalytic performance of various catalytic electrodes. (A-D) LSV curves of Ni₂Mo-NiOOH/MoO_x, Ni₂Mo/NF, Ni-NiOOH and Ni/NF catalytic electrodes with 0-5 mM MoO₄^2- added into the electrolyte containing 1 M KOH and 0.33 M CO(NH₂)₂; (E-H) LSV curves of the above catalytic electrodes with 0-50 μM Ni²⁺ added into the electrolyte. RHE: Reversible hydrogen electrode; KOH: potassium hydroxide; LSV: linear sweep voltammetry; UOR: urea oxidation reaction.