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. 2023 Oct 18;9(42):eadi8025. doi: 10.1126/sciadv.adi8025

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Fig. 2. — (A) High-resolution Ir 4f XPS spectra of Ir NPs and Ir-Sn PSC. (B) Ir L₃-edge XANES spectra of Ir foil, IrO₂, Ir NPs, and Ir-Sn PSC. (C) The Ir L₃-edge EXAFS spectra (points) and curve fits (lines) for Ir foil, Ir NPs, IrO_2, and Ir-Sn PSC. The data are k³-weighted and not phase-corrected. (D) White line peak area difference as a function of the formal d-band hole count. Ir L₃-edge XANES spectra fitting results for (E) Ir NPs and (F) Ir-Sn PSC. (G) WT-EXAFS contour maps of the Ir L₃-edge for Ir NPs and Ir-Sn PSC. (H) Sn K-edge XANES spectra of Sn foil, Ir-Sn PSC, and SnO₂. (I) The corresponding Sn K-edge EXAFS spectra (points) and curve fits (lines). The data are k³-weighted and not phase-corrected. a.u., arbitrary units.