Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3073 - 3080 (1985)
Update date:2022-08-17
Topics:
Bowker, Michael
Petts, Raymond W.
Waugh, Kenneth C.
Temperature-programmed desorption (t.p.d.) has been used to investigate the nature of the interaction of propan-2-ol with the zinc oxide surface.Adsorption at pressures of 10 Torr resulted in an averaged saturation coverage of 2 x 1E14 molecule cm-2 at 310 deg K.Temperature programming resulted in the desorption of propan-2-ol itself just above the adsorption temperature and a more strongly adsorbed intermediate species (an alkoxyl) decomposed at ca. 480 deg K to yield products of acetone, propene and hydrogen.It is proposed that these products derive from a sequential reaction scheme; first α-hydrogen elimination occurs, which yields acetone into the gas phase and an extremely reactive surface hydride.The latter then attacks remaining alkoxyl groups at a β-H position, the resulting transition state then decomposes to yield the alkene and hydrogen into the gas phase and shows a small temperature lag in the t.p.d. experiments.
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