Fig. 2: The structural characterization of Pt₁/Nb₂O₅-Ov.

a TEM images of Pt₁/Nb₂O₅-Ov. b EDS mapping images of Pt₁/Nb₂O₅-Ov. c AC–HAADF–STEM image of Pt₁/Nb₂O₅-Ov. The atomically dispersed Pt atoms are highlighted by red circles. d The k²-weighted Fourier transform spectra of Pt₁/Nb₂O₅-Ov and Pt foil.