RESEARCH / A0017
Interfacial electric field regulates surface water environment in RuO2 coated Co3O4 for proton exchange membrane water electrolysis
Read the original paper · 10.26599/NR.2026.94909092 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 5 Interfacial electric field mediated EDL optimization. (a,b) Potential-dependent absorption strength of interfacial water through in situ ATR-SEIRAS in 0.5 M H2SO4 electrolyte for Com-RuO2 (a) and RuO2-Co3O4 (b) catalysts on the Au electrode. 4-HB-H2O, 2-HB-H2O, and free-H2O are shown in red, blue and green, respectively. (c) The proportions of different types of water for RuO2-Co3O4 catalysts, derived from (b). (d) The proportions of free-H2O at varied potentials of Com-RuO2, Co3O4 and RuO2-Co3O4 respectively. (e) Potential ratio (VOER/VMOR) for Com-RuO2 and RuO2-Co3O4 at different current densities. (f,g) In situ Co K-edge XANES (f) and corresponding EXAFS data (g) of RuO2-Co3O4, at OCV, 1.3 VRHE, 1.5 VRHE and Back to OCV, respectively.
Figure S3. Wavelet transform of Co K-edge EXAFS data for Co-foil (a), Co3O4 (b) and RuO2-Co3O4 (c).
Figure S4. EXAFS fitting results of Co-foil (a), Co3O4 (b) and RuO2-Co3O4 (c).
Figure S16. (a,b) In situ Co K-edge XANES (a) and corresponding EXAFS data (b) of Co3O4, at OCV, 1.3 VRHE, 1.5 VRHE and Back to