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• W2071036703 abstract "Hydrogenation of ethylene on a Pt(111) surface in the presence of gaseous ethylene and hydrogen in the 103 Pa range was investigated by infrared reflection absorption spectroscopy (IRAS). The IRA peaks assigned to di-σ-bonded ethylene and ethylidyne were observed on Pt(111) under the flow of 1.3 × 102 Pa of ethylene and 6.5 × 103 Pa of hydrogen at 200−300 K, and the apparent activation energy of ethylene hydrogenation was estimated to be 37 ± 5 kJ mol-1 from the rate of temperature-dependent ethane production. The ethylene hydrogenation on ethylidyne-covered Pt(111) was also examined under the same condition. The peak due to the di-σ-bonded ethylene was not observed on ethylidyne-covered Pt(111), although the similar rate of hydrogenation and the similar activation energy (39 ± 5 kJ mol-1) were obtained as those on clean Pt(111). The π-bonded ethylene, which has been previously proposed as an intermediate by the sum−frequency generation (SFG) experiment under the catalytic hydrogenation condition and by IRAS under the low-temperature condition, was not detected in the present study. The similarity of the rate and activation energy for clean and ethylidyne-covered Pt(111) surfaces suggests that the rate of hydrogenation does not depend on either coverage of di-σ-bonded ethylene or ethylidyne. The role of the observed species in the hydrogenation of ethylene is discussed." @default.
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• W2071036703 date "1999-05-18" @default.
• W2071036703 modified "2023-10-18" @default.
• W2071036703 title "In-Situ Observation of Hydrogenation of Ethylene on a Pt(111) Surface under Atmospheric Pressure by Infrared Reflection Absorption Spectroscopy" @default.
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• W2071036703 doi "https://doi.org/10.1021/jp9907241" @default.
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