Extended Data Fig. 6: Catalytic activity testing and characterization of Pt@Al2O3 and Pt/Al2O3.
From: Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C
a, Arrhenius plots with 95% confidence intervals of Pt@Al2O3 and Pt/Al2O3 for propene combustion collected at conversions less than 5%. The data points are averages for three measurements. b, CO diffuse reflectance infrared spectroscopy. c, Arrhenius plots with 95% confidence intervals of Pt@Al2O3 and Pt/Al2O3 for CO oxidation collected at conversions less than 5%. The data points are averages for three measurements. d, 27Al MAS NMR spectra of fresh and aged Pt@Al2O3 and Pt/Al2O3. Peaks for four-, five-, and six-coordinated Al (AlO4, AlO5, AlO6) are labeled, with approximate percentages of each shown below the spectra. e, Proposed model schematic of Pt@Al2O3.
