Extended Data Fig. 5: Characterization of Pt samples.
From: Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C
a, XRD patterns for the samples and the bare support. ^ and * represent diffractions peaks due to γ-Al2O3 and quartz diluent, respectively. Highlighted region at 40° indicates overlapping γ-Al2O3 and Pt(111) diffraction peaks. b, XPS characterization of Pt@Al2O3-800. c, Magnitude and imaginary part of the Fourier Transform. d, EXAFS of the Pt L3-edge data and best-fits characterizing the encapsulated and supported Pt catalysts before and after aging at 800 °C. Black lines indicate the fits. e, f, Pt L3-edge XANES: (e) Pt@Al2O3; (f) Pt/Al2O3.
