Thermally stable Ir/Ce0.9La0.1O2 catalyst for high temperature methane dry reforming reaction
- 241 Downloads
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.
Keywordsthermally stable catalyst Ir/Ce0.9La0.1O2 metal–support interaction methane dry reforming
Unable to display preview. Download preview PDF.
The authors acknowledge the financial supports from National Natural Science Foundation of China (Nos. 21503142 and 21503113), Singapore National Research Foundation CREATE-SPURc program (No. R-143-001- 205-592), Singapore MOE Tier II (No. R143-000-542-112), and Academia-Industry Collaborative Innovation Foundation from Jiangsu Science and Technology Department (No. BY2014139).
- Li, W. Z.; Kovarik, L.; Mei, D. H.; Liu, J.; Wang, Y.; Peden, C. H. F. Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres. Nat. Commun. 2013, 4, 2481.Google Scholar
- Wang, F. G.; Xu, L. L.; Yang, J.; Zhang, J.; Zhang, L. Z.; Li, H.; Zhao, Y.; Li, H. X.; Wu, K.; Xu, G. Q. et al. Enhanced catalytic performance of Ir catalysts supported on ceria-based solid solutions for methane dry reforming reaction. Catal. Today, in press, DOI: 10.1016/j.cattod.2016.03.055.Google Scholar
- Li, K. Z.; Wang, H.; Wei, Y. G. Syngas generation from methane using a chemical-looping concept: A review of oxygen carriers. J. Chem. 2013, 2013, 294817.Google Scholar