Novel catalysts of Rh/ZrSnO4 were synthesized, and their catalytic activities for the direct decomposition of nitrous oxide (N2O) were investigated. ZrSnO4 with an [Formula: see text]-PbO2-type structure was used as a promoter, since the oxygen supply from its lattice was expected to facilitate N2O decomposition. Among the prepared catalysts, 1.0 wt.% Rh/ZrSnO4 exhibited the highest catalytic activity: N2O was completely decomposed at 450[Formula: see text]C. This activity was higher than those for 1.0 wt.% Rh/ZrO2 and 1.0 wt.% Rh/SnO2, indicating that the ZrSnO4solid promoted N2O decomposition. In addition, the 1.0 wt.% Rh/ZrSnO4 catalyst featured high durability in the presence of O2, CO2, and H2O vapors.
Novel ZrSn1−xCoxO4−δ catalysts for the direct decomposition of nitrous oxide (N2O) were synthesized using a co‐precipitation method. Metastable ZrSnO4 with an α‐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−δ exhibited the highest activity decomposing N2O completely decomposed at 550°C. In addition, the Zr1.17Sn0.73Co0.10O4−δ catalyst showed high durability in the presence of CO2, O2, and H2O vapor.
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