Extended Data Fig. 2: Characterization of Pt/Al2O3.
From: Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C
a, Transmission electron microscopy image. b, NP size distribution. c, d, XPS of (c) Pt 4d3/2 (332.2 eV) and Pt 4d5/2 (315.2 eV); (d) Al 2p (74.7 eV) and Pt 4f5/2 (71.5 eV) overlapping signals. e, XRD of Pt/Al2O3 calcined at 600 °C. Highlighted peaks are due to metallic Pt. f, TEM: upon calcination the average Pt NP size increases from 3.8 nm to 23.3 nm.
