An  in situ  temperature‐programmed XPS study of the surface chemical reactions of thiophene with Ag/titania | Zendy

Samokhvalov Alexander | Zendy; Duin Eduardus C. | Zendy; Nair Sachin | Zendy; Tatarchuk Bruce J. | Zendy

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An in situ temperature‐programmed XPS study of the surface chemical reactions of thiophene with Ag/titania

Author(s) -

Samokhvalov Alexander,

Duin Eduardus C.,

Nair Sachin,

Tatarchuk Bruce J.

Publication year - 2010

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.3314

Subject(s) - x ray photoelectron spectroscopy , thiophene , oxygen , sorbent , chemistry , inorganic chemistry , stoichiometry , chemical reaction , oxide , adsorption , electron paramagnetic resonance , radical , photochemistry , chemical engineering , organic chemistry , physics , nuclear magnetic resonance , engineering

The Ag/titania sorbent for the ultradeep desulfurization of liquid fuels was characterized by electron spin resonance and was found to contain nearly the stoichiometric titania, without significant concentration of Ti 3+ or the reactive oxygen species. The surface chemical reactions of thiophene adsorbed on the Ag/titania were studied by temperature‐programmed XPS from 25 to 525 °C upon in situ thermal annealing in high vacuum and in situ oxidation by oxygen gas. The titania support is not chemically reactive under those conditions. Silver oxide in the Ag/titania sorbent is converted to Ag 2 S without formation of the transient surface sulfates or sulfites and is further oxidized by molecular oxygen. Copyright © 2010 John Wiley & Sons, Ltd.

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