Fig. 3: Identification of in-situ regioselective reconstruction of Ni-doped Ce(OH)3/CeO2. | Nature Communications

Fig. 3: Identification of in-situ regioselective reconstruction of Ni-doped Ce(OH)3/CeO2.

From: Reaction-induced regioselective reconstruction of Ni-doped Ce(OH)3/CeO2 enables exceptional activity and selectivity for reverse water-shift reaction

Fig. 3

a The CO2 conversions vs. reaction time for RWGS catalyzed by the Ni-Ce(OH)3/CeO2 pre-catalysts. b HAADF-STEM and c partially enlarged HAADF-STEM images of the reconstructed Ni-Ce(OH)3/CeO2 catalysts. d XANES spectra of the Ni foil, Ni-Ce(OH)3/CeO2, reconstructed Ni-Ce(OH)3/CeO2 and NiO. e The k3 weighted Fourier-transformed spectra derived from the EXAFS spectra. f Wavelet-transform plots by using k3 space. Time-dependent SRPES measurements of g Ni L-edge and h C K-edge for the reconstructed Ni-Ce(OH)3/CeO2 catalysts under Ar treatment. i In-situ DRIFTS analysis of the Ni-Ce(OH)3/CeO2 pre-catalysts treated by various gases. The reconstructed Ni-Ce(OH)3/CeO2 catalysts were obtained by in-situ treatment of the Ni-Ce(OH)3/CeO2 pre-catalysts under a H2:CO2 ratio of 3:1 at 600 °C for 2 h.

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