Fig. 3: Characterizations of verifying the effect of absorbed water on Td-Co(II) formation. | Nature Communications

Fig. 3: Characterizations of verifying the effect of absorbed water on Td-Co(II) formation.

From: Illustrating new understanding of adsorbed water on silica for inducing tetrahedral cobalt(II) for propane dehydrogenation

Fig. 3

a XRD pattens, b in-situ H2-TPR profiles, c quasi in-situ Co 2p XPS spectra, d ex-situ UV-vis spectra of the four designed catalysts; e UV-vis spectra of the dried catalyst precursors (without reduction treatment), f 1H-NMR of the dried catalyst precursors with different Co loadings; g the normalized intensity of Co K-edge XANES spectra, h the corresponding Fourier transformation of k3-weighted EXAFS oscillation of the dried precursor for Dir-reduction catalyst; i UV-vis spectra of the Dir-reduction catalysts by using different reduction temperature.

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