Fig. 1: Morphology and structure of (PtNiCo)core(PtNiOCoO)surface.
From: Surface oxygenation of multicomponent nanoparticles toward active and stable oxidation catalysts
a HR-TEM of PtNiCo–PtNiOCoO/Al2O3 (n = 42, m = 39, 1.0 wt%), showing lattice spacing at edge (noted L.S.O, 0.204 nm); and lattice spacing in the center (noted L.S.i, 0.177 nm); scale bar = 2.0 nm; b the corresponding EDX elemental mapping, Pt (blue), Ni (green), and Co (red) in a. c illustration of the fully reduced ternary alloy state and the surface-oxygenated states of two different oxygenation degrees under the indicated conditions; d the fcc lattice parameter change corresponding to the reduced and oxygenated states as determined by in situ HE-XRD/PDF analysis; e the M–O coordination number corresponding to the surface-oxygenated states as determined by EXAFS spectral analysis; and f the symbols and legends corresponding to the illustration in c.
