High-entropy intermetallics on ceria as efficient catalysts for the oxidative dehydrogenation of propane using CO 2 .

The oxidative dehydrogenation of propane using CO 2 (CO 2 -ODP) is a promising technique for high-yield propylene production and CO 2 utilization. The development of a highly efficient catalyst for CO 2 -ODP is of great interest and benefit to the chemical industry as well as net zero emissions. Here, we report a unique catalyst material and design concept based on high-entropy intermetallics for this challenging chemistry. A senary (PtCoNi)(SnInGa) catalyst supported on CeO 2 with a PtSn intermetallic structure exhibits a considerably higher catalytic activity, C 3 H 6 selectivity, long-term stability, and CO 2 utilization efficiency at 600 °C than previously reported. Multi-metallization of the Pt and Sn sites by Co/Ni and In/Ga, respectively, greatly enhances propylene selectivity, CO 2 activation ability, thermal stability, and regenerable ability. The results obtained in this study can promote carbon-neutralization of industrial processes for light alkane conversion.