Abstract
There is long-term interest in catalyst poisoning due to the buildup of carbonaceous species on catalytic metal surfaces. These species are often derived from the reactants themselves in reactions ...
Highlights
There has been great interest in understanding the ordering of organic monolayers for because of their role as catalyst poisons, as well as for their applicability to optoelectronic applications [1,2]
Using scanning tunneling microscopy (STM), we have found that upon annealing to 400 K a stable intermediate formed by partial oxidation of toluene on Ag(110) forms highly ordered domains with a length scale well over 1000 Å, limited only by the size of surface terraces
The experiments were performed in ultrahigh vacuum (UHV) chambers equipped with STM (SPM 100, RHK), low energy electron diffraction (LEED), Auger electron spectroscopy (AES) (PRI 179), a quadrupole mass spectrometer (QME 200, Balzers) and reflection-absorption infrared spectroscopy (RAIRS)
Summary
There has been great interest in understanding the ordering of organic monolayers for because of their role as catalyst poisons, as well as for their applicability to optoelectronic applications [1,2]. Intermediate resulting from the partial oxidation of toluene by adsorbed atomic oxygen on Ag(110) selforganizes into ordered domains larger than 1000 Å, limited only by the size of the terrace. Partial oxidation of toluene is an industrially important process, yielding products such as benzyl alcohol [6,7], benzaldehyde [8,9,10] and benzoic acid [11] over various catalysts, in all of which silver is an essential ingredient. It is not understood why silver is needed in these catalysts. Using temperature-programmed reaction spectroscopy (TPRS), we have investigated the reactions of toluene with adsorbed atomic oxygen on Ag(110)
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