Structure Effects of Benzene Hydrogenation Studied with Sum Frequency Generation Vibrational Spectroscopy and Kinetics on Pt(111) and Pt(100) Single-Crystal Surfaces

Sum frequency generation (SFG) surface vibrational spectroscopy and kinetic measurements using gas chromatography have identified at least two reaction pathways for benzene hydrogenation on the Pt(100) and Pt(111) single-crystal surfaces at Torr pressures. Kinetic studies at low temperatures (310−370 K) show that benzene hydrogenation does not proceed through cyclohexene. A Langmuir−Hinshelwood-type rate law for the low-temperature reaction...