Fig. 6.

Stability test of 0.17%Pt@MCM-22-300H₂ under NO + H₂ conditions. During the in situ TEM experiments, the sample was treated in mixture of H₂ (0.1 torr) and NO (0.1 torr) for 15 min at different reaction temperature, respectively. The above images were recorded in the presence of NO+H₂ gases at different temperature. a 200 °C, b 400 °C, c 600 °C, d 800 °C, e 1,000 °C, f 1,200 °C. Scale bar in all the images in this figure: 20 nm