Direct decomposition of nitrous oxide by rhodium supported on ZrSnO4

Novel catalysts of Rh/ZrSnO 4 were synthesized, and their catalytic activities for the direct decomposition of nitrous oxide (N 2 O) were investigated. ZrSnO 4 with an [Formula: see text]-PbO 2 -type structure was used as a promoter, since the oxygen supply from its lattice was expected to facilitate N 2 O decomposition. Among the prepared catalysts, 1.0 wt.% Rh/ZrSnO 4 exhibited the highest catalytic activity: N 2 O was completely decomposed at [Formula: see text]C. This activity was higher than those for 1.0 wt.% Rh/ZrO 2 and 1.0 wt.% Rh/SnO 2 , indicating that the ZrSnO 4 solid promoted N 2 O decomposition. In addition, the 1.0 wt.% Rh/ZrSnO 4 catalyst featured high durability in the presence of O 2 , CO 2 , and H 2 O vapors.