Fig. 2: Structural characterization of HEASA-Pt2.3%, Pt1-NiCoMgBiSn.
From: High-entropy alloyed single-atom Pt for methanol oxidation electrocatalysis
a Aberration-corrected HAADF-STEM image of an HEASA-Pt nanoparticle and EDS mapping images of each element in HEASA-Pt. b XANES of HEASA-Pt2.3%, HEA-Pt17.6%, Pt foil, and PtO2 at the Pt L3-edge. c FT-EXAFS of HEASA-Pt2.3%, HEA-Pt17.6%, Pt foil, and PtO2 at the Pt L3-edge. d Comparison of the Pt-Pt coordination number of Pt foil, HEA-Pt, PtO2, and HEASA-Pt. The error bars represent standard deviations generated by the least-squares method. Fitting results of the magnitude of the Fourier transform of the k3-weighted EXAFS spectra for e HEASA-Pt2.3% and (f) HEA-Pt17.6%. g WTs of EXAFS spectra of HEASA-Pt2.3%, HEA-Pt17.6%, Pt foil, and PtO2. Source data for Fig. 2b−g are provided as a Source Data file.
