In Situ Modulation Excitation IR Study on the Dominant Product of Pt-Catalyzed Aromatic Ketone Hydrogenation

Abstract:

Chemoselective hydrogenation of aromatic ketones plays an important role in producing fine chemicals and pharmaceuticals. One of the simplest model reactions is acetophenone (AP) hydrogenation to corresponding alcohol 1-phenylethanol (PE). We studied the role of dominant product 1-phenylethanol (PE) on a Pt/Al2O3 catalyst. In situ attenuated total reflection infrared spectroscopy (ATR-IR) in combination with modulation excitation spectroscopy (MES) and phase sensitive detection (PSD) revealed that PE was more strongly adsorbed on Al2O3 than on Pt. PE was hardly hydrogenated to 1-cyclohexylethanol (CE) on the support. CO from AP decomposition didn’t inhibit PE adsorption on the support. The strong adsorption and accumulation of PE on the support allows active sites on Pt always accessible to AP, achieving efficient Pt-catalyzed catalysis.

• Periodical: Advanced Materials Research (Volume 683)
• Pages: 271-274
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.683.271
• Online since: April 2013
• Authors: Meng Meng Chen, Nobutaka Maeda, Alfons Baiker, Jun Huang
• Keywords: 1-Phenylethanol (PE), Acetophenone Chemoselective Hydrogenation, Attenuated Total Reflection Infrared Spectroscopy (ATR-IR), Dominant Product, Modulation Excitation Spectroscopy (MES), Phase Sensitive Detection (PSD), Pt/Al₂O₃

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