Temperature-programmed desorption multilayer

The TiO2(110) surface can be modified to alter the surface chemistry of adsorbed methoxides. Recently Vohs et al. [73] have reported temperature programmed desorption studies of methanol on TiO2(110)-supported V2O5. Deposited monolayer films of vanadia converted some of the adsorbed methanol to formaldehyde and water, while multilayer films of vanadia on the TiO2(110) surface were found to be inactive for methanol oxidation. Furthermore, adsorption studies of formaldehyde indicated that formaldehyde production from... 

Monolayers and multilayers of CF3I were developed on Au(lll) and subjected to temperature programmed desorption (TPD) in the absence or presence of electron radiation. The nature of the adsorbed molecules was investigated by RAIRS, and the species produced during TDP were characterized by quadrupole MS309. 

Low energy (55 eV) electron irradiation of multilayers of methanol on silver has been used in conjunction with temperature-programmed desorption of the products as a method to identify radiolysis products. In this case several products such as methoxymethanol were identified . The primary photochemical process in the methanol system is thought to involve the fission of a C—H bond forming a heteroatom stabilized cation such as 6. In addition to methoxymethanol glycolaldehyde (5) or methyl formate are also detected. Apparently the methanol system is unreactive to UV irradiation either at 240 nm or at 355 nm . 

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