Fig. 5: Stability improvement of the Ru oxide anodes.
From: Undoped ruthenium oxide as a stable catalyst for the acidic oxygen evolution reaction
a XRD patterns of the h-RuOx after thermal treatments. b Ru K-edge XANES spectra with an inset showing the enlarged region, and (c) Ru K-edge EXAFS spectra of the h-RuOx after thermal treatments showing the electronic structure changes after removing the coordinated water. d PEMWE stability test with the h-RuOx-300 anode for operating at 1 A cm‒2. e PEMWE stability test with the anh-RuO2-S anode for operating at 4 A cm‒2, and (f) Nyquist plots collected at the BoL and EoL from galvanostatic EIS measurements at 100 mA cm‒2. Source data are provided as a Source Data file.
