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The IR and UV—vis diffuse reflectance spectra of mesoporous WO 3 /ZrO 2  are discussed and a scheme proposed for the acid site structure on the WO 3 /ZrO 2  surface. The high Brönsted acidity of WO 3 /ZrO 2  (H 0  ≤ −11.38) can be explained by the formation of large zirconium polytungstate species such as [≡ Zr 6  1/2+ W 6  6 +O 20  2− ] −  H +  on the WO 3 /ZrO 2  surface.

Study of the Acid Site Structure on the WO3/ZrO2 Surface

Study of the Acid Site Structure on the WO₃/ZrO₂ Surface