Structure sensitivity, selectivity, and adsorbed intermediates in the reactions of acetone and 2-propanol on the polar surfaces of zinc oxide

Journal Article · Thu Jan 10 00:00:00 EST 1991 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100154a055· OSTI ID:5852020

Vohs, J M; Barteau, M A ^[1]

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1. Univ. of Delaware, Newark (USA)

The reactions of 2-propanol and acetone on the (0001)-Zn and (000{anti 1})-O polar surfaces of zinc oxide were investigated by using temperature-programmed desorption and x-ray photoelectron spectroscopy. 2-Propanol adsorbed dissociatively on the (0001)-Zn surface to form surface isopropoxide ((CH{sub 3}){sub 2}HCO) species. These alkoxide intermediates underwent both dehydration and hydrogenation reactions to produce propylene and acetone. Acetone dissociated on the (0001)-Zn surface to form enolate intermediates, fingerprinted by a broad envelope in the C(1s) spectrum. These enolates decomposed unselectively above 600 K to deposit carbon, which was oxidized to CO and CO{sub 2} at higher temperatures. Neither acetone nor 2-propanol reacted on the oxygen polar surface, and both were adsorbed molecularly and desorbed intact from this surface below 300 K.

• OSTI ID: 5852020
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 95:1; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ZINC OXIDES
CATALYTIC EFFECTS
ACETONE
EXPERIMENTAL DATA
HIGH TEMPERATURE
MEASURING METHODS
PHOTOELECTRON SPECTROSCOPY
PROPANOLS
ALCOHOLS
CHALCOGENIDES
DATA
ELECTRON SPECTROSCOPY
HYDROXY COMPOUNDS
INFORMATION
KETONES
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
ZINC COMPOUNDS
400201* - Chemical & Physicochemical Properties