Chemical forms of hydroxyls on/in Zirconia: An FT-IR study

Nanostructured Ce1−Zr O2 solid solutions produced by mechanochemical processing

“…From comparison of the spectra, we can observe that the n OH band has higher intensity for the sample milled for a shorter time. Considering that the intensity of this band decreases with the milling, the fraction of amorphous ZrO 2 is reduced from ZR025 to ZR1 [40]. Then, the interaction between ZrCl 4 and NaOH can be expressed:…”

Review: monoclinic zirconia, its surface sites and their interaction with carbon monoxide

“…2. The latter species has been assigned either tribridged 7,25,70,71 , bibridged 29,53,61,63 or simply presumed as multicoordinated OH groups 18,19,23,59 . In this work, the term multicoordinated is generally used to refer to this species.…”

“…Merle-Méjean et al have found that on an air-calcined zirconia the hydroxyl species are H/D exchanged in contact with D 2 (507 • C, 100 hPa) so quickly that it gives reason to believe the OH species are on the surface only 63 . Conversely, on the steam-calcined zirconia there are some hydroxyls exchanged to deuterium-containing species so slowly (during several hours), if at all, that they must be elsewhere in the oxide, likely in the bulk 63 .…”

“…Conversely, on the steam-calcined zirconia there are some hydroxyls exchanged to deuterium-containing species so slowly (during several hours), if at all, that they must be elsewhere in the oxide, likely in the bulk 63 .…”

Stabilization of the (110) tetragonal zirconia surface by hydroxyl chemical transformation

“…The hydroxylation of ZrO 2 was studied experimentally by different groups [17,18] founding that most of the surface hydroxyl groups were in bi-and tribridged structures. Riess et al [19] studied chemisorption and physisorption of water on the Y 2 O 3 -doped ZrO 2 (cubic phase) by conductivity measurements and thermogravimetry.…”