Surface chemistry and structural changes of a potassia promoted, chromia stabilised iron oxide catalyst were examined before and after the non oxidative dehydrogenation of ethylbenzene to styrene using x-ray photoelectron spectroscopy (xps).
xps binding energies of the Fe(2p, 3s, 3p, 3d), K(2p, 3s, 3p), Cr(2p, 3s, 3p) and O(1s) levels along with characteristic shifts in the binding energies, spin-orbit splittings and satellite, multiplet splittings help in identifying surface active species such as Fe2O3, Fe3O4, FeOOH at the surface of fresh and used catalysts.
Volume 134, 2022
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