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Low-temperature Reduction of N2O by H2 over Pt/SiO2 Catalysts
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 Title & Authors
Low-temperature Reduction of N2O by H2 over Pt/SiO2 Catalysts
Kim, Moon Hyeon; Kim, Dae Hwan;
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The present work has been devoted to the catalytic reduction of by with catalysts at very low temperatures, such as , and their nanoparticle sizes have been determined by using titration, X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM) measurements. A sample of 1.72% , which had been prepared by an ion exchange method, consisted of almost atomic levels of Pt nanoparticles with 1.16 nm that are very consistent with the HRTEM measurements, while a catalyst possessing the same Pt amount via an incipient wetness technique did 13.5 nm particles as determined by the XRD measurements. These two catalysts showed a noticeable difference in the on-stream activity maintenance profiles at . This discrepancy was associated with the nanoparticle sizes, i.e., the catalyst with the smaller particle size was much more active for the reduction. When repeated measurements of the reduction with the 1.16 nm Pt catalyst at were allowed, the catalyst deactivation occurred, depending somewhat on regeneration excursions.
Nitrous oxide(); reduction;Hydrogen();Low temperature;Pt nanoparticles;
 Cited by
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