Vanadia-promoted Ru/TiO2 catalysts for enhanced CO2 methanation
(2026) International Journal of Hydrogen Energy — Vol. 250, p. 155968 (2026)
Files
Hongmanorom Debecker Vanadium ruthenium CO2 methanation 2026.pdf
Open Access - Adobe PDF
- 1.63 MB
A187-26 Hongmanorom Int J Hydrogen Energy V-Ru-TiO2 CO2 methanation.pdf
Restricted Access - Adobe PDF
- 4.81 MB
Details
- Authors
- Abstract
- Gaining insight into the role of metal promoters in CO2 methanation is essential for designing more effective methanation catalysts. In this study, Ru-based catalysts supported on V2O5–TiO2 were prepared via sequential wet impregnation to unravel the origin of the promotional effect of vanadia on Ru/TiO2 catalysts. Tuning the relative composition of TiO2 and V2O5 allows the synergistic interactions between the support components and Ru nanoparticles to be optimized. At 200°C, Ru/12%V2O5–TiO2 catalyst achieves CH4 formation rate of 1.22 μmolgcat−1s−1, outperforming both Ru/TiO2 and Ru/V2O5 catalysts. Its superior activity is attributed to the combined effects of TiO2, which helps maintaining relatively high Ru dispersion, and V2O5, which is reduced by hydrogen spillover from Ru, generating surface oxygen vacancies and hydroxyl groups. The latter species are shown to promote the formation of formate intermediates, while higher Ru dispersion facilitates their decomposition to adsorbed CO prior to hydrogenation to CH4.
- Affiliations
Citations
Hongmanorom, P., Van Eeckhout, R., Devred, F., & Debecker, D. (2026). Vanadia-promoted Ru/TiO2 catalysts for enhanced CO2 methanation. International Journal of Hydrogen Energy, 250, 155968. https://doi.org/10.1016/j.ijhydene.2026.155968 (Original work published 2026)