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- W3036137189 abstract "Despite their industrial use in selective hydrogenation reactions, the surface chemistry of long-chained alkynes on transition metals is not well understood. To this end, the two C₆-alkynes 1- and 3-hexyne were studied on Pt(111) using temperature-programmed desorption (TPD), electron emission spectroscopies (MIES/UPS), and infrared reflection–absorption spectroscopy (IRRAS). Besides the formation of graphitic carbon residues, both molecules mainly undergo desorption, self-hydrogenation, and dehydrocyclization to form benzene during temperature-programmed desorption, similar to the analogous alkenes. The dehydrocyclization to benzene is shown to be ubiquitous to unsaturated hydrocarbons on Pt(111) regardless of the degree of unsaturation and its position within the molecule. A reaction mechanism for dehydrocyclization is proposed based on dehydrogenation followed by ring-closure. This work extends the understanding of alkyne chemistry on Pt-based catalysts and may aid to identify additional reaction mechanisms leading to undesired coke formation." @default.
- W3036137189 created "2020-06-25" @default.
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- W3036137189 date "2018-01-01" @default.
- W3036137189 modified "2023-09-23" @default.
- W3036137189 title "Surface Chemistry of 1- and 3-Hexyne on Pt(111): Desorption, Decomposition, and Dehydrocyclization C" @default.
- W3036137189 hasPublicationYear "2018" @default.
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