Al2O3 Nanorod with Rich Pentacoordinate Al3+ Sites Stabilizing Co2+ for Propane Dehydrogenation

The search for inexpensive, environmentally friendly, and highly effective catalysts to activate C-H bonds in propane dehydrogenation (PDH) reactions is still a major challenge. Co-based have gained significant attention recent years due their excellent ability high selectivity towards olefins, despite being non-noble unfriendly metal. However, further improvements are necessary practical utilization, particularly terms of activity anti-carbon deposition capacity. In this study, we synthesized Al2O3 nanorods with abundant pentacoordinated Al3+ (Al3+penta) sites. supported Co on the nanorod (Co/Al2O3-NR) exhibited higher (>96% propylene selectivity) stability (deactivation rate 0.15 h−1) compared an nanosheet fewer Various characterizations confirmed that Co(II) mainly exists as CoAl2O4 rather than Co3O4 form Co/Al2O3-NR, which inhibits reduction Co0 accordingly improves catalyst stability.