Figure 3: Analysis of O-vacancies on the pyramidal nanofaceted surface of SC CoO NRs. | Nature Communications

Figure 3: Analysis of O-vacancies on the pyramidal nanofaceted surface of SC CoO NRs.

From: Engineering surface atomic structure of single-crystal cobalt (II) oxide nanorods for superior electrocatalysis

Figure 3

(a,b) O-K edge and Co-L2,3 edge XANES spectra of SC CoO NRs and reference CoO, respectively. In a the peak at ∼536 eV of SC CoO NRs is assigned to O deficiency. In b the peaks at 781.5 and ∼800 eV of SC CoO NRs shift towards low photon energy relative to the reference CoO, indicating the transfer of electrons from O-vacancies to Co d band. (c) O-vacancy formation energies on {100}, {110} and {111}-O facets of CoO showing a significant reduction in the vacancy formation energy on {111}-O facets.

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