• • Achieves 90% ethyl acetate conversion at 266 °C with 100% CO2 selectivity, enabling energy-efficient VOC abatement below typical industrial incineration thresholds (>300 °C).
• • Exhibits a turnover frequency of 101.5 ± 0.8 h−1 based on total metal content, outperforming conventional transition metal oxide catalysts by a factor of 2–3, reducing catalyst loading and cost.
• • Maintains structural and catalytic stability over five consecutive cycles and under thermal stress, with no significant phase segregation or activity loss, ensuring long-term operational reliability.
• • 18O isotope labeling confirms the Mars-van-Krevelen mechanism with high lattice oxygen mobility, providing a design principle for tuning metal–oxygen bond synergy in high-entropy oxides.