Chemical stability of sulfate ions deposited on iron oxide


Sulfate ions deposited on iron oxide were thermally stable up to ca. 770 K. When pyridine, ammonia, n-butane, and 1-butene were preadsorbed, however, they decomposed to generate gaseous SO2 at much lower temperatures due to the reaction between these molecules and sulfate ions. Implications of these findings in characterization and catalysis of this type of superacid catalyst are discussed.


Сульфатные ионы, нанесенные на окись железа, термически ставильны при прибл. 770 K. Однако, при предварительной адсорбции пиридина, аммония, н-бутана и 1-бутена выделение SO2 наблюдалось при гораздо низших температурах, вследствие реакции первых с сульфатными ионами. Обсуждается катализ с помощью такого типа суперкислотных катализаторов.

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Park, D.S., Lee, J.S. Chemical stability of sulfate ions deposited on iron oxide. React Kinet Catal Lett 40, 101–106 (1989).

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  • Oxide
  • Iron
  • Sulfate
  • Ammonia
  • Physical Chemistry