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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 1. Morphology and structural characterization of the as-prepared catalysts. (A₁ and A₂) SEM images of Ni-NiOOH; (B₁ and B₂) SEM images of Ni₂Mo/NF; (C₁ and C₂) SEM images of Ni₂Mo-NiOOH/MoO_x; (D) TEM image of Ni₂Mo-NiOOH/MoO_x; (E) HRTEM image of Ni₂Mo-NiOOH/MoO_x; (F) SAED pattern of Ni₂Mo-NiOOH/MoO_x; (G) EDS elemental mapping images of Ni₂Mo-NiOOH/MoO_x (Ni, Mo, O, N). SEM: Scanning electron microscopy; NF: nickel foam; HRTEM: high-resolution transmission electron microscopy; EDS: energy-dispersive X-ray spectroscopy; SAED: selected area electron diffraction.