Extended Data Fig. 3: Propene combustion light off curves of Pt@Al2O3.
From: Templated encapsulation of platinum-based catalysts promotes high-temperature stability to 1,100 °C
a, Fresh Pt@Al2O3 and metal-free Al2O3 support. Reaction mixture: 0.15 vol.% C3H6, 3 vol.% O2, and 5 vol.% steam (balance Ar). b, As-prepared Pt@Al2O3 and the aged catalyst after consecutive three cycles (aging performed at 800 °C for 2 h in the reaction mixture). 30 mg of the catalyst was mixed with 160 mg of SiC diluent. Catalyst pretreatment: 300 °C, 30 min 5 vol.% O2 (40 ml/min), 10 min Ar (40 ml/min), 30 min 5 vol.% H2 (40 ml/min). Reaction mixture: 0.15 vol.% C3H6, 3 vol.% O2, 5 vol.% H2O, balance Ar (50 ml/min total flow rate).
