pH-dependent reactivity of water at MgO(100) and MgO(111) surfaces
Narendra M. Adhikari, Piotr Zarzycki, Zhe-Ming Wang, Kevin M. Rosso
Abstract
in water at ambient conditions. For both hydroxylated MgO(100) and MgO(111) surfaces, the PZC is found to be around pH ∼ 12, which compares well with reported values for MgO single crystal and nanoparticle surfaces. However, structure specific differences in the molecular water hydrogen bonding network near the surface are evident at mildly acidic pH. To our knowledge, this is the first account of the PZC values for the MgO(111) single-crystal surface, an electrostatically unstable MgO termination that is prone to reconstruction.
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