Boosting CO2 methanation activity on Ru/TiO2 catalysts by exposing (001) facets of anatase TiO2

Origin of the synergistic effect between TiO2 crystalline phases in the Ni/TiO2-catalyzed CO2 methanation reaction

“…Each phase exhibits different physical and chemical properties, such as thermal stability, density and band gap as well as surface structure [27,28]. Several works have been conducted to investigate the influence of the support in methanation catalysts: TiO2 vs Al2O3 or SiO2 supports, but also TiO2-anatase vs TiO2-rutile vs TiO2-P25 (a commercial mixture of rutile and anatase phases) [29][30][31][32][33][34]. On cobalt-based catalysts, the activity of a Co/TiO2-rutile catalyst is remarkably higher than that of Co/TiO2-anatase; and while CH4 is selectively produced on Co/TiO2-rutile, CO is the main product on Co/TiO2-anatase.…”

TiO2-Based Nanostructures, Composites and Hybrid Photocatalysts

“…Finally, Gao et al performed first-principle calculation of density of states modification caused by the presence of atoms belonging to the platinum family (Pd, Ru, Rh) as dopants of anatase TiO 2 (101) surfaces, calculating the possible formation of occupied states above valence band edge and below the center the band-gap region, associated with Ru and Rh atoms [44]. These results can provide a support for the interesting experimental results on the photocatalytic performances of Ru-doped TiO 2 [47].…”

Oxygen vacancies in Ru/TiO2 - drivers of low-temperature CO2 methanation assessed by multimodal operando spectroscopy

“…We next focus our interest on benchmarking the activity of our solgel catalyst against catalysts from previous relevant reports ( Abdel-Mageed et al., 2020 , 2021 ; Abe et al., 2009 ; Chai et al., 2019 ; Kim et al., 2016 , 2018 ; Lin et al., 2014 , 2017 ; Petala and Panagiotopoulou, 2018 ; Sassoye et al., 2011 ) ( Table S1 ). The methane formation rates calculated according to Equation 1 at differential conditions between 140°C and 210°C are shown in Figure 3 B.…”

“…The following references appear in the supplemental information: Abdel-Mageed et al., 2020 , 2021 ; Abe et al., 2009 ; Chai et al., 2019 ; Kim et al., 2018 ; Kim et al., 2016 ; Lin et al., 2014 , 2017 ; Petala and Panagiotopoulou, 2018 ; Sassoye et al., 2011 .…”