TY - JOUR
T1 - Effects of SiO2-doping on high-surface-area Ru/TiO2 catalysts for the selective CO methanation
AU - Cisneros, Sebastian
AU - Chen, Shilong
AU - Diemant, Thomas
AU - Bansmann, Joachim
AU - Abdel-Mageed, Ali M.
AU - Goepel, Michael
AU - Olesen, Sine E.
AU - Welter, Eike S.
AU - Parlinska-Wojtan, Magdalena
AU - Gläser, Roger
AU - Chorkendorff, Ib
AU - Behm, R. Jürgen
PY - 2021
Y1 - 2021
N2 - Aiming at a better understanding of the role of electronic / chemical modifications of the support on the performance of high specific surface area Ru/TiO2 catalysts in the selective CO methanation, we prepared and examined four different Ru/TiO2 catalysts with similar Ru loading and similar high specific surface area, but with the support doped with different amounts of Si (0–12 wt.% SiO2). Their activity for methane formation exhibits a volcano-shaped dependence on the SiO2 content, with a maximum between 4 and 8 wt.%. The CO adsorption properties showed distinct differences, with the weakest CO adsorption strength for the most active catalysts. Based on the results of a variety of different characterization techniques and pyrrole/pyridine adsorption measurements, the higher activity / lower CO adsorption strength cannot be explained by a single property, such as particle size, but must rather be caused by a complex combination of different effects.
AB - Aiming at a better understanding of the role of electronic / chemical modifications of the support on the performance of high specific surface area Ru/TiO2 catalysts in the selective CO methanation, we prepared and examined four different Ru/TiO2 catalysts with similar Ru loading and similar high specific surface area, but with the support doped with different amounts of Si (0–12 wt.% SiO2). Their activity for methane formation exhibits a volcano-shaped dependence on the SiO2 content, with a maximum between 4 and 8 wt.%. The CO adsorption properties showed distinct differences, with the weakest CO adsorption strength for the most active catalysts. Based on the results of a variety of different characterization techniques and pyrrole/pyridine adsorption measurements, the higher activity / lower CO adsorption strength cannot be explained by a single property, such as particle size, but must rather be caused by a complex combination of different effects.
KW - Selective CO methanation
KW - Si-doping
KW - Ru catalyst
KW - DRIFTS
KW - UV–Vis spectroscopy
U2 - 10.1016/j.apcatb.2020.119483
DO - 10.1016/j.apcatb.2020.119483
M3 - Journal article
SN - 0926-3373
VL - 282
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119483
ER -