Thermally stable Ir/Ce0.9La0.1O2 catalyst for high temperature methane dry reforming reaction

In this study, the use of a thermally stable Ir/Ce 0.9 La 0.1 O 2 catalyst was investigated for the dry reforming of methane. The doping of La 2 O 3 into the CeO 2 lattice enhanced the chemical and physical properties of the Ir/Ce 0.9 La 0.1 O 2 catalyst, such as redox properties, Ir dispersion, oxygen storage capacity, and thermal stability, with respect to the Ir/CeO 2 catalyst. Hence, the Ir/Ce 0.9 La 0.1 O 2 catalyst exhibits higher activity and stabler performance for the dry reforming of methane than the Ir/CeO 2 catalyst. This observation can be mainly attributed to the stronger interaction between the metal and support in the Ir/Ce 0.9 La 0.1 O 2 catalyst stabilizing the catalyst structure and improving the oxygen storage capacity, leading to negligible aggregation of Ir nanoparticles and the Ce 0.9 La 0.1 O 2 support at high temperatures, as well as the rapid removal of carbon deposits at the boundaries between the Ir metal and the Ce 0.9 La 0.1 O 2 support.