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- W2070142839 abstract "The effect of pre-reduction conditions on the H2 chemisorption kinetics of high surface area Pd(0.53 wt.%)/Ce0.8Zr0.2O2 was investigated by means of temperature-programmed reduction, oxygen-storage capacity, IR spectroscopy and volumetric hydrogen measurements. In the 20–80 ° C range, the pre-reduction rate was very fast and dependent on temperature, with an apparent activation energy of 58 kJ mol−1. Distinction between PdO reduction and H spillover processes is only possible at low H2 pressures. The total H2 uptake and the chemisorption rate strongly decrease by the use of high H2 pressures during the pre-reduction process. Irreversible reduction with the concomitant oxygen vacancies formation occurs at low temperature, as demonstrated by in situ IR experiments. However, H2 uptake on the Pd(0.53 wt.%)/Ce0.8Zr0.2O2 during pre-reduction and chemisorption is recovered by reoxidation at 400 ° C." @default.
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- W2070142839 date "2005-12-01" @default.
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- W2070142839 title "Kinetics of hydrogen chemisorption on high surface area Pd/Ce0.8Zr0.2O2" @default.
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- W2070142839 doi "https://doi.org/10.1016/j.jallcom.2004.10.096" @default.
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