Breakthroughs in hard X-ray diffraction: towards a multiscale science approach in heterogeneous catalysis.

: Modern heterogeneous catalysis would benefit from a multiscale science approach bridging the molecular world with the macroscopic world. Because of recent breakthroughs in X‐ray diffraction methods, including the surface X‐ray diffraction of atomically flat model catalysts, X‐ray diffraction tomography of catalyst bodies, and X‐ray profiling of an active catalyst in a chemical reactor, such an approach is now within reach.[Image: see text]