Abstract:The samples of K 2 Fe 22 O 34 phase were synthesized and characterized by XRD, BET, SEM-EDX and XPS. K + diffusion was investigated by impedance spectroscopy, whereas the surface segregation and desorption were monitored by Kelvin Probe (changes in work function) and Species Resolved Thermal Alkali Desorption, at the temperature range of 600-1000 K. The analysis of changes in work function and desorption signals (K and K + ) at various temperatures allowed to resolve the kinetic parameters (flux, rate constant… Show more
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