Can the equilibrium interfacial tensions be more in magnitude than non-equilibrium ones? Comment on 'Electrocapillarity and zero-frequency differential capacitance at the interface between mercury and ionic liquids measured using the pendant drop method' by N. Nishi et al. [Phys. Chem. Chem. Phys., 2015, 17, 5219]

In the paper commented upon, the electrocapillary curves for mercury in ionic liquids, obtained by static (pendant drop) and dynamic (drop-time) measurement methods, were compared to support the inference about ultraslow relaxation at the interface. Yet, the static, i.e. equilibrium interfacial tensions proved to be more in magnitude (at E