Insight into the Partial Oxidation of Propene:  The Reactions of 2-Propen-1-ol on Clean and O-Covered Mo(110)

Abstract

The reactions of 2-propen-1-ol (allyl alcohol) were studied on clean and O-covered Mo(110) to understand the effect of resonance stabilization and the presence of surface oxygen on reaction selectivity. Propene is the only gaseous hydrocarbon product evolved from allyl alcohol reaction on O-covered Mo(110). Water and dihydrogen are also produced, along with a small amount of adsorbed carbon. We estimated, using X-ray photoelectron spectroscopy, that approximately 70% of the 0.11 ML of 2-propen-1-ol that reacts forms propene. In contrast, the dominant reaction pathway on the clean surface is nonselective decomposition to adsorbed carbon and hydrogen, leading to a 23% selectivity for propene formation. On both clean and O-covered Mo(110), X-ray photoelectron spectroscopy and infrared spectroscopy identify allyloxy as the reaction intermediate yielding propene. These results are discussed in the context of propene oxidation and periodic trends in reactivity.

Mechanistic and spectroscopic identification of initial reaction intermediates for prenal decomposition on a platinum model catalyst

“…The characterization of multistep reaction mechanisms involving various subsequent or even simultaneous reaction intermediates remains one of the greatest challenges in chemistry, and especially in surface science and heterogeneous catalysis. In the last decade, only a few experimental studies have tackled such a question on single crystal surfaces, [1][2][3][4] and some have succeeded in identifying reaction intermediates. [5][6][7][8] Highresolution electron energy loss spectroscopy (HREELS), highresolution X-ray photoelectron spectroscopy (HRXPS), sum frequency generation (SFG), reflection absorption infrared spectroscopy (RAIRS), transmission electron microscopy (TEM) and temperature programmed desorption or reaction (TPD/TPR) have been used to detect them.…”

Carbon−Nitrogen Place Exchange on NO Exposed β-Mo2C

“…Diener et al reported that oxygen on Mo(110) is characterized by a peak at 530.9 eV and a satellite at 532.5 eV. 43 The low-bindingenergy peak in each case may be readily attributed to highcoordination atomic oxygen. The high-binding-energy peak in Figure 2 is assigned to surface oxo on the basis of the RAIRS data.…”

A Pathway for NH Addition to Styrene Promoted by Gold

“…[37] The crystal was biased at À100 V during the collection of temperature-programmed reaction data, so as to avoid an electron-induced reaction from the mass-spectrometer filament. The temperature was measured with a K-type (Chromega/ Alomega) thermocouple and radiative heating was used to achieve the temperature ramp to 650 K. The heating rate for TPRS was relatively linear, in the range 150-600 K with an average of about 6 Ks .…”