Ma. Karolewski et Rg. Cavell, CHARACTERIZATION BY SIMS OF BRONSTED ACID CHEMISORPTION ON MGO(100) AND CS MGO(100)/, Surface science, 290(1-2), 1993, pp. 80-92
The room temperature chemisorption of a variety of molecules possessin
g Bronsted acid character has been investigated on MgO(100) and Cs/MgO
(100) substrates by secondary ion mass spectrometry (SIMS). The adsorb
ates studied include: acetylene (ethyne), hydrogen sulphide, 2-propano
l, acetone (2-propanone), formic acid and methanol. The emphasis of th
e study is placed on the qualitative identification of the adsorbed sp
ecies which is in most cases the conjugate base of the Bronsted acid.
An exception is 2-propanol whose interaction with MgO and Cs/MgO appar
ently involved dehydration. There is also evidence for decomposition o
f formic acid in its initial interaction with Cs/MgO.