Electronic structure modulating for supported Rh catalysts toward CO2 methanation

Authors

Yueyue Jiang, Shanghai Jiao Tong University
Junyu Lang, Shanghai Jiao Tong University
Xuechen Wu, Shanghai Jiao Tong University
Yun Hang Hu, Michigan Technological UniversityFollow

Document Type

Article

Publication Date

1-27-2020

Department

Department of Materials Science and Engineering

Abstract

Methanation of carbon dioxide is a promising approach to ameliorate greenhouse effect. Rhodium based catalysts have been intensively investigated due to its ability in cleavage of CO bond, but the role of support in the catalysts was underestimated. In this regard, we explored the methanation of CO₂ over Rh catalysts with three metal oxide supports (TiO₂, Al₂O₃, and ZnO). It was found that Rh/TiO2 exhibited the highest catalytic activity with product yield of 455 mmol g_cat^-1 h⁻¹ (CH₄ and CO) at 370 °C and 2 MPa, which is 2 and 14 times higher than Rh/A12O3 and Rh/ZnO, respectively. Moreover, the CH4 selectivity over Rh/TiO₂ was higher than 95 %. The superior catalytic performance of Rh/TiO₂ can be mainly attributed to its unique electronic structure associated with stronger Rh-TiO₂ interaction and the existence of Ti³⁺ ions on TiO₂.

Publication Title

Catalysis Today

Recommended Citation

Jiang, Y., Lang, J., Wu, X., & Hu, Y. H. (2020). Electronic structure modulating for supported Rh catalysts toward CO2 methanation. Catalysis Today. http://doi.org/10.1016/j.cattod.2020.01.029
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/1672