Extended Data Fig. 6: Operando XAS analysis results.
From: Pt migration–lockup in zeolite for stable propane dehydrogenation catalyst
a, Sn K-edge XANES spectra of 0.25%Pt–Sn@S-1(4.00 μm) at different reaction times in PDH at 600 °C. b, The radial distance space χ(R) spectra of 0.25%Pt–Sn@S-1(4.00 μm) at different reaction times in PDH at 600 °C. The quantitative χ(R) space Sn K-edge spectrum fitted curves of 0.25%Pt–Sn@S-1(4.00 μm)-600-H2 (c), 0.25%Pt–Sn@S-1(4.00 μm)-PDH-3 h (d) and 0.25%Pt–Sn@S-1(4.00 μm)-PDH-10 h (e). Notes: for the EXAFS spectra fitting, the amplitude reduction factor \({S}_{0}^{2}=0.70\) was obtained through fitting the SnO2. The Sn K-edge EXAFS spectra were obtained by subtracting the pre-edge appropriate background and post-edge normalizing. The k2-weighted EXAFS functions were Fourier transformed (FT) in the k range 3–10 Å−1 and multiplied by a hanging window with a sill size of 1 Å−1, obtaining the high-quality data ranges (R = 1.0–3.0 Å) in radical space.
