Thermally stable Ir/Ce0.9La0.1O2 catalyst for high temperature methane dry reforming reaction
thermally stable catalyst, Ir/Ce0.9La0.1O2, metal–support interaction, methane dry reforming
ABSTRACT In this study, the use of a thermally stable Ir/Ce0.9La0.1O2 catalyst was investigated for the dry reforming of methane. The doping of La2O3 into the CeO2 lattice enhanced the chemical and physical properties of the Ir/Ce0.9La0.1O2 catalyst, such as redox properties, Ir dispersion, oxygen storage capacity, and thermal stability, with respect to the Ir/CeO2 catalyst. Hence, the Ir/Ce0.9La0.1O2 catalyst exhibits higher activity and stabler performance for the dry reforming of methane than the Ir/CeO2 catalyst. This observation can be mainly attributed to the stronger interaction between the metal and support in the Ir/Ce0.9La0.1O2 catalyst stabilizing the catalyst structure and improving the oxygen storage capacity, leading to negligible aggregation of Ir nanoparticles and the Ce0.9La0.1O2 support at high temperatures, as well as the rapid removal of carbon deposits at the boundaries between the Ir metal and the Ce0.9La0.1O2 support.
Tsinghua University Press
Fagen Wang,Leilei Xu,Weidong Shi,Jian Zhang,Kai Wu,Yu Zhao,Hui Li,He Xing Li,Guo Qin Xu,Wei Chen, Thermally stable Ir/Ce0.9La0.1O2 catalyst for high temperature methane dry reforming reaction. NanoRes.2017, 10(2): 364–380