Surface and reduction energetics of the CeO2-ZrO2 catalysts

Article Abstract:

Experiments were performed to investigate the surface and energy properties of the 110, 111 and 310 areas of CeO2-ZrO2 solid solutions. In particular, the oxidation-reduction behavior of the Ce4+/Ce3+ was examined. Atomistic models of the samples were analyzed. The findings showed an inverse relationship between surface energy and zirconia content in the 310 sample, as surface energy is increased, the zirconia content decreased. Moreover, the reduction energy of the Ce4+/Ce3+ was most stable in the 110 and 111 samples following increasing zirconia content.

Catalysts, Oxidation-reduction reaction, Oxidation-reduction reactions, Ionic solutions, Cerium, Surface energy

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Characterization of the metal phase in NM/Ce0.68Zr0.32O2 (NM: pt and pd) catalysts by hydrogen chemisorption and HRTEM microscopy: a comparative study

Article Abstract:

The effect of different reduction treatments both on the metal nanostructure and particle size distribution and on the chemical behavior of pt- and pd-loaded Ce0.68Zr0.32O2 catalysts are investigated by HRTEM and hydrogen chemisorption techniques. It is found that both Pd and Pt particles grow on the CZ support in accordance with some well-defined structural relationships.

Science & research, Analysis, Chemistry, Analytic, Analytical chemistry, Chemical reactions, Metal catalysts, Chemical properties

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Rhodium dispersion in a Rh/Ce0.68Zr0.32O2 catalyst investigated by HRTEM and H2 chemisorption

Article Abstract:

It has been possible to use a H2 chemisorption method linking low temperature and low H2 pressures to measure the rhodium metal dispersion in a Rh/Ce0.68Zr0.32O2 catalyst. At higher reduction temperatures, deactivation effects upon H2 adsorption should be taken into account.

Dispersion, Dispersion (Optics), Rhodium

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