A query on the Mg 2p binding energy of MgO

Abstract

The low Mg 2p value (47.0 eV) of MgO reported in Res Chem Intermed 44(2018)829 is carefully analyzed and discussed based on a series of X-ray photoelectron spectroscopy (XPS) experiments and literature results. Presence of carbon or ferric oxide did not change the binding energy (BE) of Mg 2p of MgO, and the Mg 2p peak of MgO should be above 49.0 eV instead of at 47.0 eV.