Correlations between Acidity, Surface Structure, and Catalytic Activity of Niobium Oxide Supported on Zirconia - Normandie Université Access content directly
Journal Articles Journal of Physical Chemistry B Year : 2005

Correlations between Acidity, Surface Structure, and Catalytic Activity of Niobium Oxide Supported on Zirconia

Abstract

The development of the acidity and the relationship between acidity, catalytic activity, and the surface structure for niobium oxide supported on zirconia were investigated for a series of solids. The catalysts were active for 2-propanol dehydration only above a threshold in Nb loading. The acidity was studied by infrared spectroscopy of adsorbed 2,6-dimethylpyridine as a probe molecule, and the onset of activity was correlated with that of the formation of relatively strong Brønsted acid sites. The variation in the abundance of these sites also correlated with the catalytic activity. Raman, IR, and UV spectroscopy results indicated that the active sites were related to polymeric Nb surface species. These results were compared to those previously reported for the WOx/ZrO2 catalysts

Domains

Catalysis

Dates and versions

hal-03379942 , version 1 (15-10-2021)

Identifiers

Cite

Thomas Onfroy, Guillaume Clet, Marwan Houalla. Correlations between Acidity, Surface Structure, and Catalytic Activity of Niobium Oxide Supported on Zirconia. Journal of Physical Chemistry B, 2005, 109 (30), pp.14588-14594. ⟨10.1021/jp0517347⟩. ⟨hal-03379942⟩
11 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More