Fig. 4: Enhanced electron conduction on Al–MgO. | Nature Communications

Fig. 4: Enhanced electron conduction on Al–MgO.

From: Heteroatom doping enables hydrogen spillover via H+/e− diffusion pathways on a non-reducible metal oxide

Fig. 4

a Changes in visible light absorption for WO3 mixed with Ru-loaded MgO (left) and Al–MgO (right) based on in situ UV-vis spectroscopy. Inset: photographs of the specimens before and after the trials. b ESR spectra acquired from Ru-loaded MgO and Al–MgO after H2 reduction. Inset: photographs of the specimens. c Results obtained from DFT calculations for the model in the upper left of this subfigure. A diagram showing the spin electron density for a hydrogen on MgO having one Al atom (bottom left) and the PDOS results (right). The plot in the upper right is an enlarged view of the CBM. d Calculated excitation probability values for electrons at various temperatures as determined using an Egap of 3.0 or 0.29 eV. e Proposed e− migration pathways within Al–MgO mediated by the donor levels associated with added Al.

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