High-efficiency CO2 utilization in isobutane dehydrogenation over ZnAl hydrotalcite derivatives: optimizing calcination temperature and unlocking the reaction mechanism

ZnAl-LDH-derived ZnAlOx with Zn 0 species and oxygen vacancies achieves optimal CO 2 -ODHB activity via calcination tuning. In situ DRIFTS and multi-atmosphere experiments confirm a Mars–van Krevelen mechanism dominates.