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Figure 2
Function for adjusting the water window. (a) Schematic illustration of X-ray penetration through the catalyst and electrolyte. (b) Intensity loss (%) for X-rays with different energies after penetrating 50 µm thickness of H2O or 1.0 M KOH electrolyte. (c) Intensity loss (%) for X-rays with a characteristic 9.2 keV energy after penetrating different thicknesses of H2O or 1.0 M KOH electrolyte. (d)–(e) Schemes for adjusting the thickness of the water window by screwing in (180 µm) and out (1500 µm) the small rotating caps (components 2 and 6) to obtain better diffraction signals. The testing was conducted on a laboratory-based XRD spectrometer using an In–Ga metal-jet X-ray source with a characteristic energy of 9.2 keV.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 5| September 2025| Pages 1272-1281
https://doi.org/10.1107/S1600577525005612
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