Study of ruthenium supported on Ta2O5–ZrO2 and Nb2O5–ZrO2 as catalysts for the partial oxidation of methane
✍ Scribed by Valerio Choque; Narcís Homs; Renata Cicha-Szot; Pilar Ramírez de la Piscina
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 340 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0920-5861
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Sol-gel derived titania based mixed oxides TiO 2 -SiO 2 and TiO 2 -ZrO 2 were used as supports for preparing a series of catalysts with vanadia contents varying between 1-25 wt.%. The supports and the catalysts were characterized by employing 51 V and 1 H solid-state MAS NMR, diffuse reflectance FT-
Up to 1.5 mol% Nb O was added to 9 mol% Y O -stabilized ZrO . According to an XRD analysis, the addition of 2 5 2 3 2 Nb O did not change the cubic structure of YSZ. As a result of the repulsion effect of the grain-boundary interface and the 2 5 preferential segregation of Y O , the Nb O segregation