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Study of hydrogen adsorption over Pt/MoO3 catalyst

Triwahyono, S. and Jalil, A. A. (2008) Study of hydrogen adsorption over Pt/MoO3 catalyst. In: Regional Annual Fundamental Science Seminar 2008 (RAFSS 2008, 27-29 May 2008, Ibnu Sina Institute for Fundamental Science Studies, UTM.

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Abstract

The rate controlling step and the energy barrier involved in the hydrogen adsorption over Pt/MoO3 were studied. Rate of hydrogen adsorptions on Pt/MoO3 were measured in the adsorption temperature range of 323 - 573 K and initial hydrogen pressure of 50 Torr. The rate of hydrogen uptake was very high for initial few minutes for adsorption at 473 K and above, and the adsorption continued more than 10 h for adsorption below 473 K. The adsorption of hydrogen involved the dissociatively adsorption of hydrogen on Pt sites to form hydrogen atoms, spillover of hydrogen atoms onto the surface of support catalyst and diffusion of spiltover hydrogen atom over the surface of support catalyst. The rate controlling step was the surface diffusion with the activation energy was 83.1 kJ/mol.

Item Type:Conference or Workshop Item (Paper)
Subjects:Q Science > QD Chemistry
Divisions:Science
ID Code:6260
Deposited By: Dr Siew Ling Lee
Deposited On:08 Oct 2008 04:31
Last Modified:30 Aug 2012 10:00

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