Fig. 3: Catalyst chemical state and CCM structure changes after the stability test.
From: Undoped ruthenium oxide as a stable catalyst for the acidic oxygen evolution reaction
a Ru K-edge XANES spectra with an inset showing the enlarged region and (b) EXAFS spectra collected from the anh-RuO2 anode at the start and after the stability tests at 1 A cm‒2 and 4 A cm‒2 for 100 h, respectively. c Ru K-edge XANES spectra with an inset showing the enlarged region and d, EXAFS spectra collected from the h-RuOx anode prior and after the failure at 1 A cm‒2. EDS elemental mapping of the Pt, Ru and F distribution in the CCMs with (e) anh-RuO2 anode, and (f), h-RuOx anode after the stability tests. Source data are provided as a Source Data file.
