ToF-SIMS studies of the surface of Pd/ZrO2-TiO2 catalyst used in the hydrodechlorination process

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ToF-SIMS studies of the surface of Pd/ZrO2-TiO2 catalyst used in the hydrodechlorination process

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used in order to obtain the information about the surface composition of Pd/ZrO2-TiO2 catalyst and to estimate the changes in the concentration of particular components on its surface during the hydrodechlorination of CCl4. The results demonstrated that the hydrodechlorination process led to the increase in the concentration of chlorine and the drop in the amount of surface accessible palladium, while the quantity of Pd-Cl bounds did not change considerably. It suggested that the presence of ZrO2 protected the surface of the studied catalyst against the formation of PdCl2.

Grams J., Szynkowska M. I.: Applications of Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) to Investigations of Metal/Support Catalysts, in Norris C.P. (Ed.), Focus on Surface Science Research, Nova Science Publishers, p. 69 - 97, 2005.

Grams J., Góralski J., Kleczewska J., Szczepaniak B., Sobczak I., Kusior A.: Selected Examples of an Application of Time-of-Flight Secondary Ion Mass Spectrometry to Surface Investigations of Catalysts Utilized in the Environment Protection, Pol. J. Environ. Stud., 2006, 15(6A), 57.

Grams J., Góralski J., Szczepaniak B., Paryjczak T.: The estimation of the chlorine content on the surface of Pd/ZrO2-Al2O3 catalyst by ToF-SIMS, Pol. J. Environ. Stud., 2005, 14(Suppl. IV), 89.

Szczepaniak B., Góralski J., Grams J., Paryjczak T.: Badanie aktywności katalizatorów Pd/TiO2 w reakcji wodoroodchlorowaniaCCl4, Przem. Chem., 2006, 85(8 - 9), 764.

Grams J., Góralski J., Szczepaniak B.: ToF-SIMS as a new technique for the investigations of deactivation process of hydrodechlorination catalysts, Russ. J. Phys. Chem., in press.

Szczepaniak B., Góralski J., Grams J., Paryjczak T.: Influence of SMSI Effect on the Activity of Pd/TiO2 Catalysts in Hydrodechlorination Reaction with CCl4, Pol. J. Environ. Stud., 2006, 15(6A), 161.

Polish Journal of Chemical Technology

The Journal of West Pomeranian University of Technology, Szczecin

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