Methyl Nitrite Adsorption as a Novel Route to the Surface Methoxy Intermediate
| Autor: | John W. Peck, Bruce K. Koel, David E. Beck, Daniel I Mahon |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Chemistry
Methyl nitrite Thermal decomposition Formaldehyde Photochemistry Heterogeneous catalysis Dissociation (chemistry) Surfaces Coatings and Films Metal chemistry.chemical_compound Adsorption visual_art Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Selectivity |
| Zdroj: | The Journal of Physical Chemistry B. 102:3321-3323 |
| ISSN: | 1520-5207 1520-6106 |
| Popis: | Surface-bound methoxy species are intermediates in a variety of surface processes, ranging from heterogeneous catalysis to advanced fuel cells, yet their chemistry on many metals remains elusive because of the difficulty of cleanly preparing adsorbed layers of these species. We propose that thermal dissociation of an adsorbed precursor, methyl nitrite (CH3ONO), can be used to produce methoxy species on reactive metal surfaces at low temperatures. On two Pt−Sn alloys, the methoxy intermediate is strongly stabilized (to 300 K) against thermal decomposition compared to Pt(111), where dissociation occurs at below 140 K, and there is a high selectivity to produce formaldehyde. These Pt−Sn alloys do not form the CO and H2 dissociation products characteristic of methoxy chemistry on Pt(111). |
| Databáze: | OpenAIRE |
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