The adsorption and reactions of hydrocarbons on Molybdenum single crystal surfaces; when clean and in the presence of co-adsorbed sulfur or carbon
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Exploring thiophene desulfurization: The adsorption of thiophene on transition metal surfaces
2019, Surface ScienceCitation Excerpt :Out of all of those mentioned surfaces, thiophene on Mo(100) has been studied the most [10–20]; likely due to MoS2 use in industrial HDS catalysts. Over Mo(100), thiophene has been observed to break apart [11,13–17,19–20]. Motivated by the observed decomposition of thiophene over Mo(100) and our own observation of thiophene rupturing over Ni(100), characterized by the breaking of a single C–S bond [21], we study the adsorption of thiophene over Al(100), Ir(100), W(100), Mo(100), Cr(100), Ta(100), Nb(100), V(100), and Co(10–10) with several goals in mind.
Organic chemistry on solid surfaces
2006, Surface Science ReportsCitation Excerpt :For instance, C/Mo(110) has some carbon atoms in interstitial positions, and therefore represents realistically carbide surfaces, whereas N/Mo(100) and N/Mo(110) surfaces, typically produced by decomposing N2 or NH3 on Mo(100) or Mo(110) single crystals to mimic molybdenum nitrides, only have surface nitrogen atoms, and thus show no activity towards either ethylene or cyclopentene conversion [726,766,767]. Likewise, the deposition of sulfur atoms on metal surfaces is known to reduce the decomposition activity of those surfaces by site-blocking [761,768–770], but in some cases may tune the selectivity in favor of other reactions such as hydrogenation, dehydrogenation, and isomerization [569,762]. The issue of the role of the nature of local atomic ensembles in determining surface reactivity has proven particularly critical in these solids.
Reactivity studies with gold-supported molybdenum nanoparticles
2005, Surface ScienceA pH-dependent SERS study of thiophene-2-carboxylic acid adsorbed on Ag-sols
2003, Chemical Physics LettersCitation Excerpt :As the pH is lowered, there is a significant intensity reversal of 236 and 320 cm−1 bands along with an overall reduction of intensity. There are evidences of S-elimination, by metal surfaces, from thiophene and other S-containing molecules of the crude oil in the industrially important hydrodesulphurization [16–18,25–27]. In TCA elimination of S-atom may be inferred at pH=2.
Adsorption and reaction of thiophene on α-Mo<inf>2</inf>C(0 0 0 1)
2002, Surface Science