The BCDI measurements were performed with a photon energy of 13 keV (λ = 0.95 Å) at the ID01 beamline of the European Synchrotron Radiation facility. Beam size was focused down to 690 nm (horizontally) × 630 nm (vertically) using Be compound refractive lenses. The electrochemical cell was mounted on a Physik Instrumente Mars xyz piezoelectric stage (lateral stroke 100 μm, resolution 2 nm) sitting on a hexapod mounted on a (3 + 2 circle) goniometer. Liquid electrolyte was continuously pumped through the cell during all measurements by a peristaltic pump. The diffracted beam was recorded with a 2D Maxipix photon-counting detector (pixel size 55 × 55 μm²) positioned on the detector arm at a distance of 0.87 m. We measured 002 Pt Bragg reflection in three dimensions by rotating the particle around the Bragg angle (16.12°) through 1°, in steps of 0.0125° with a counting time of 0.2 s per point and total flux of about 1.4 × 10¹² counts s^–1 μm². The detector was positioned at an out-of-plane angle of around 28°. The timescale of one BCDI measurement was ~10 min.