Facile C-O bond scission in alcohols on Zn surfaces

Harikumar, K. R. ; Vinod, C. P. ; Kulkarni, G. U. ; Rao, C. N. R. (1999) Facile C-O bond scission in alcohols on Zn surfaces Journal of Physical Chemistry B, 103 (13). pp. 2445-2452. ISSN 1520-6106

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp983730q

Related URL: http://dx.doi.org/10.1021/jp983730q


Interaction of methanol, ethanol, and 2-propanol with polycrystalline as well as (0001) surfaces of Zn has been investigated by photoelectron spectroscopy and vibrational energy loss spectroscopy. All the alcohols show evidence for the condensed species along with the chemisorbed species at 80 K. With increase in temperature to ~120 K, the condensed species desorbs, leaving the chemisorbed species which decomposes to give the alkoxy species. The alkoxy species is produced increasingly at lower temperatures as we go from methanol to 2-propanol, the 2-propoxy species occurring even at 80 K. The alkoxy species undergo C-O bond scission giving rise to a hydrocarbon species and oxygen. The C-O bond cleavage occurs at a relatively low temperature of ~150 K. The effect of preadsorbed oxygen is to stabilize the methoxy species and prevent C-O bond scission. On the other hand, coadsorption of oxygen with methanol favors the formation of the methoxy species and gives rise to hydrocarbon species arising from the C-O bond scission even at 80 K.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:43485
Deposited On:11 Jun 2011 13:47
Last Modified:11 Jun 2011 13:47

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