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Modern Applications of Electron Microscopy to Catalysis

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Abstract

The active sites of ultra-dispersed Pt/γ-Al2O3 catalysts are studied using high-resolution electron microscopy, Z-contrast and dark field. In addition we have calculated using a method based in density functional theory the electrostatic potential and charge distribution of the active sites. It is conclude that the most likely Pt clusters that are formed correspond to Pt13 and Pt with icosahedral and decahedral structure. It is shown that this is consistent with the electron microscopy data.

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Authors and Affiliations

  1. Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000, México D.F., Mexico

    M. José Yacamán & S. Tehuacanero

  2. Instituto Nacional de Investigaciones Nucleares, Amsterdam 46-202, Col. Hippódromo Condesa, 06100, México D.F., Mexico

    M. José Yacamán, J.A. Ascencio & M. Marín

Authors
  1. M. José Yacamán
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  2. J.A. Ascencio
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  3. S. Tehuacanero
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  4. M. Marín
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Yacamán, M.J., Ascencio, J., Tehuacanero, S. et al. Modern Applications of Electron Microscopy to Catalysis. Topics in Catalysis 18, 167–173 (2002). https://doi.org/10.1023/A:1013826319242

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