Dynamic X‐Ray Diffraction Computed Tomography Reveals Real‐Time Insight into Catalyst Active Phase Evolution

Chemistry by color: The first dynamic study using X‐ray diffraction computed tomography investigates the evolving chemistry and structural changes during the preparation of a millimeter‐sized industrial hydrogenation catalyst body (see picture; time evolves from left to right, and different colors represent different phases). The method has potential for chemical imaging of materials within bulk objects undergoing physicochemical changes.