Fig. 2

Reduced pair distribution function (G(r)) of the reference 3C-SrIrO3 (Pnma) catalyst (top). G(r) evolution during in-situ measurements, with the color gradient from dark blue to light blue indicating a transition from the initial state (before current application) to later time points (bottom). The corresponding distances between pairs of elements taken from 3C-SrIrO3 are represented by rectangles.