Fig. 2: Determination of chemical constituents from the in situ HERFD-XANES study and the MCR-ALS analysis.
From: X-ray studies bridge the molecular and macro length scales during the emergence of CoO assemblies
a Selected HERFD-XANES spectra of the time series with the main edge shown in the first and the pre-edge in the second row. The spectra are plotted together with the multivariate curve resolution by alternating least squares (MCR-ALS) compounds recovered at the respective times. Linear combinations of the recovered spectra (black solid lines) match the in situ data (dotted lines). b Spectra of the recovered MCR-ALS compounds compared with measured reference spectra of Co(III) acetylacetonate (acac) dissolved in benzyl alcohol (red), Co(acac)2 (orange), and CoO (violet). Dashed vertical lines emphasize the edge positions of Co2+ (“A” at 7720.2 eV) and Co3+ (“B” at 7723.6 eV). c Relative concentrations of the MCR-ALS compounds over reaction time. The dashed line indicates the temperature set point. We set t0 (beginning of reaction time) to the point when we start heating to 160 °C.
