CaO-Doped Rh/Al2O3 as a Highly Effective Catalyst for Catalytic N2O Decomposition

• • At 300 °C, 0.5Rh/Al2O3 yields <5% N2O conversion, while 0.5Rh-4Ca/Al2O3 achieves 50% conversion, demonstrating a >10-fold improvement in low-temperature activity, critical for reducing energy input in industrial abatement. • • CaO doping enhances water resistance, a key operational advantage for treating humid industrial streams where conventional catalysts suffer deactivation. • • The 0.5Rh-4Ca/Al2O3 catalyst maintains stable conversion over 40 h on stream, indicating robust long-term durability for continuous industrial operation. • • The presence of oxygen has negligible effect on catalytic activity, simplifying process design by eliminating the need for oxygen removal upstream.