Probing palladium-silica interactions in Pd/SiO2 catalysts subjected to high temperature reduction

• Autorzy: Łomot D.
• Języki publikacji: EN

Abstrakty

EN

Metal-support interactions in silica-supported palladium catalyst have been re-investigated. In addition to the already recognized model reaction of 2,2-dimethylpropane with hydrogen, where the isomerization selectivity appears as a useful indication in diagnosing changes in the catalyst, another effective probe has been used: a variable capability of differently modified palladium to form the hydride phase. High temperature reduction at 600 degree C of 1.6 wt% Pd/SiO2 results in the formation of palladium silicide. However, the prove of this fact by X-ray diffraction is ambiguous or impossible, because of a low content of highly dispersed Pd-containing phase. On the other hand, the formation (stability) of Pd hydride provides an interesting diagnostic tool: Pd/SiO2 transformed into Pd silicide does not form the metal hydride phase. The stability of the Pd hydride phase and the catalytic conversion of 2,2-dimethylpropane are complementary methods is probing silica-supported palladium catalysts.

Słowa kluczowe

EN

reduction; Pd-silica interactions; 2,2-dimethylpropane conversion; isomerization selectivity; catalysis

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 12
• Strony: 2598--2605
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Łomot D.

• Departament of Catalysis on Metals, Institute of Physical Chemistry, Polish Academy of Sciences, ul Kasprzaka 44/52 01-224 Warszawa, Poland