Journal article
Effects of SiO2-doping on high-surface-area Ru/TiO2 catalysts for the selective CO methanation
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.
Language: | English |
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Year: | 2021 |
Pages: | 119483 |
ISSN: | 18733883 and 09263373 |
Types: | Journal article |
DOI: | 10.1016/j.apcatb.2020.119483 |
ORCIDs: | Chorkendorff, Ib , 0000-0001-9069-7056 , 0000-0002-2889-403X , 0000-0003-3205-7450 , 0000-0003-4160-0611 , 0000-0002-8134-4280 and 0000-0002-7565-0628 |