Novel cobalt-doped ZrSnO4 catalysts for direct nitrous oxide decomposition

Novel ZrSn1-xCoxO4-delta catalysts for the direct decomposition of nitrous oxide (N2O) were synthesized using a co-precipitation method. Metastable ZrSnO4 with an alpha-PbO2-type structure was used as the mother solid because of its interstitial open spaces derived from its lattice distortion that may be effective for N2O adsorption. The doping of Co2+/3+ into the ZrSnO4 lattice improved the N2O decomposition activity, likely owing to the enhancement of the redox properties and the increase in the number of oxygen vacancies. Among the prepared catalysts, Zr1.17Sn0.73Co0.10O4-delta exhibited the highest activity decomposing N2O completely decomposed at 550 degrees C. In addition, the Zr1.17Sn0.73Co0.10O4-delta catalyst showed high durability in the presence of CO2, O-2, and H2O vapor.

Automated summary

Novel ZrSn1-xCoxO4-delta catalysts were synthesized for the direct decomposition of N2O. The doping of Co2+/3+ into the ZrSnO4 lattice improved the catalyst activity and durability. Among the catalysts, Zr1.17Sn0.73Co0.10O4-delta exhibited the highest activity decomposing N2O completely at 550 degrees C and showed high durability in the presence of CO2, O-2, and H2O vapor.