RESEARCH / A0229
Activating and Stabilizing Lattice Oxygen in Cobalt Oxyhydroxide for Efficient Water Oxidation
Read the original paper · 10.1021/acs.chemmater.5c02400 ↗
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 2. Electronic environment investigation of VAl-CoOOH. (a) Co K-edge XANES spectra and (b) calculated Co oxidation states for VAl- CoOOH, CoOOH, Co3O4, and Co foil. (c) Co 2p XPS spectra of VAl-CoOOH and CoOOH. (d) FT-EXAFS of VAl-CoOOH, CoOOH, and Co foil. (e,f) Wavelet transform of Co K-edge EXAFS data for (e) CoOOH and (f) VAl-CoOOH.
Figure 5. Mechanistic insights into interfacial electric double layer structure and catalytic stability. (a,b) in situ ATR-SEIRAS spectra of (a) VAl- CoOOH and (b) CoOOH at different applied voltages in the 1.0 M KOH electrolyte; (c) K·H2O proportion in EDLs for VAl-CoOOH and CoOOH; (d) in situ XANES spectra of VAl-CoOOH at different applied potentials in 1.0 M KOH. (e) In situ Raman spectra of VAl-CoOOH at different applied potentials in 1.0 M KOH. (f) Schematic illustration of the interfacial environments of the CoOOH surface and VAl-CoOOH surface. (g) Schematic illustration of simplified OER mechanism modulation: activating and stabilizing lattice oxygen.