Fig. 3: Correlation between the LMSI and catalytic activity of NiFe-Fe3O4 catalyst in hydrogen oxidation reaction.
From: Looping metal-support interaction in heterogeneous catalysts during redox reactions
a Operando MS data obtained post-TEM at temperatures from 400 °C to 800 °C. b, c SAED pattern and corresponding peaks analysis of the catalyst. d–h Representative TEM images of NiFe-Fe3O4 nanoparticles at different temperatures captured from Supplementary Movie 5–9. i–m Dynamics velocity analyses with an optical flow method based on Supplementary Movie 5–9. n Lifespan from tracking diffraction spots of in-situ SAED (Supplementary Movies 10 and 11) pattern captured with heating under ambient conditions. The reciprocal spacing and lifespan of each dot are shown in the function of temperature. o The average dynamics velocity (blue dots), and the lifespan of diffraction spots (red dots) across various temperature stages illustrate a close correlation between structural dynamics and catalytic activity.
