Fig. 5: Operando 3D distribution of the displacement field during CO oxidation reaction.
From: Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis
a Displacement field along (111) of the same AuNP2 nanoparticle under CO/O2 at RT, 300 and 400 °C, during the entire catalytic hysteresis loop. b Corresponding 3D strain structure of highly compressive (blue, strain < −0.00045) and tensile (red, strain > 0.00045) strained regions. The black arrow is indicating the orientation of the q111 scattering vector. The particle shape is shown as a semi-transparent grey isosurface. c 3D strain distribution at 400 °C with maximum of compressive (blue) and tensile (red) strains regions of the six {100} facets of the cube (f1 to f6). d Statistical distribution of strain of the cube facets (f1 violet, f2 red, f3 blue, f4 green, f5 orange and f6 black). Scale bar, 30 nm. The green gradient is illustrating the increase/decrease of catalytic activity.
