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Ethylene adsorption on Pt/Au/SiO2 catalysts

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Abstract

Ethylene adsorption on a Pt/Au/SiO2 catalyst (2 wt% Pt; Au/Pt atomic ratio of 10) was studied using adsorption microcalorimetry and FTIR spectroscopy. Ethylene adsorption at 300 K on Pt/Au/SiO2 produced π‐bonded, di‐σ‐bonded, and ethylidyne species with an initial heat of 140 kJ/mol, compared to a heat of 157 kJ/mol for Pt/SiO2 on which only ethylidyne species formed. At 203 and 263 K, ethylene adsorbed on Pt as well as on Au surface atoms for the Pt/Au/SiO2 catalyst. Quantum chemical, DFT calculations indicate that Au exerts a significantly smaller electronic effect on Pt than does addition of Sn to Pt.

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Authors and Affiliations

  1. Department of Chemical Engineering, University of Wisconsin‐Madison, Madison, WI, 53706, USA

    Jianyi Shen, Josephine M. Hill, Ramchandra M. Watwe, S.G. Podkolzin & J.A. Dumesic

  2. Department of Chemistry, Nanjing University, Nanjing, 210093, China

    Jianyi Shen

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  1. Jianyi Shen
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  2. Josephine M. Hill
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  3. Ramchandra M. Watwe
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  4. S.G. Podkolzin
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  5. J.A. Dumesic
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Shen, J., Hill, J.M., Watwe, R.M. et al. Ethylene adsorption on Pt/Au/SiO2 catalysts. Catalysis Letters 60, 1–9 (1999). https://doi.org/10.1023/A:1019038503569

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