Abstract
In situ Mössbauer study of ethylbenzene dehydrogenation on potassium-promoted iron oxide containing different contents of cerium oxide has been investigated. The results show that the addition of cerium to the FeK systems decreased the hyperfine magnetic fields for Fe 3+ ions, due to the near neighbor and next near neighbor of Fe 3+ ions to be partially occupied by cerium ions. In addition, the presence of cerium enhanced the stability of the FeK phase and reducibility of Fe oxide to Fe 3O 4 at the reaction condition.
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