Journal
CATALYSIS TODAY
Volume 112, Issue 1-4, Pages 49-52Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2005.11.026
Keywords
water-gas shift; noble metal catalysts; reducible oxides; CeO2
Ask authors/readers for more resources
The catalytic activity of supported noble metal catalysts (Pt, Rh, Ru, and Pd) for the WGS reaction is investigated with respect to the physichochemical properties of the metallic phase and the support. It has been found that, for all metal-support combinations investigated, Pt is Much more active than Pd, while Rh and Ru exhibit intermediate activity. The turnover frequency (TOF) of CO conversion does not depend on metal loading, dispersion or crystallite size, but depends Strongly on the nature of the metal oxide carrier. In particular, catalytic activity of Pt and Ru catalysts, is 1-2 orders of magnitude higher when Supported on reducible (TiO2, CeO2, La2O3, and YSZ) rather than on irreducible (Al2O3, MgO, and SiO2) metal oxides. In contrast to what has been found in Our previous Study over Pt/TiO2 catalysts, catalytic activity of dispersed Pt does not depend on the structural and morphological characteristics Of CeO2, such as specific surface area or primary crystallite size. (c) 2005 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available