RESEARCH / A0130
Unraveling the Crystal-Field-Mediated Cobalt Spin-State Evolution for Electrocatalytic Ethylene Glycol Oxidation by In Situ X-Ray Emission Spectroscopy
Read the original paper · 10.1002/anie.4512481 ↗
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 Structural characterization of CoOOH with high spin states. (a) Schematic illustration of 3d orbital geometries in CoOOH/NF and P-CoOOH/NF. (b) In situ XES spectra of CoMoO4 during reconstruction. (c) In situ XES spectra of P-CoMoO4 during reconstruction. (d) Co K-edge XAS spectra. (e) R-space XAFS spectra. (f) WT diagram of CoOOH/NF. (g) WT diagram of P-CoOOH/NF. (h) Co L-edge XAS spectra of CoOOH/NF and P-CoOOH/NF. (i) P K-edge XES spectra. (j) O K-edge XAS spectrum (inset; enlarged leading edge of P-CoOOH/NF from 531 to 534 eV). (k) Magnetic hysteresis loops of CoOOH/NF and P-CoOOH/NF were examined at 300 K. (l) Temperature-dependent magnetization (M–T) curves at H = 100 Oe.