Application of the beta PdH Decomposition for Characterization of Supported Palladium Catalysts

• Autorzy: Bonarowska M. , Karpiński Z.
• Języki publikacji: EN

Abstrakty

EN

Temperature-programmed (palladium) hydride decomposition (TPHD) appeared to be a convenient method for characterization of supported palladium catalysts. Both the amount of hydrogen released from the catalyst and the temperature of hydride decomposition are sensitive diagnostic parameters to wards determining the mean size and, especially, the size distribution of palladium particles. On the other hand, carbiding of Pd/SiO2 catalysts hinders in corporation of hydrogen into Pd bulk. The rate of temperature increase during the temperature-programmed hydride decomposition experiments seems to be an important factor. Application of too steep temperature ramps (e.g. 20°C/min) leads to the results which are less in formative than the results obtained for lower ramps because the TPHD components characteristic for hydride decompositions from differently sized Pd crystal lites merge into a single feature.

Słowa kluczowe

EN

Pd/SiO2 catalyst; Pd dispersion; temperature-programmed hydride de composition

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2008
• Tom: Vol. 82, nr 10
• Strony: 1973--1979
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Bonarowska M.

autor

Karpiński Z.

• Institute of Physical Chemistry of PAS, ul. Kasprzaka 44/52, 01-224 Warszawa, Poland Fax: [phone],

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