Further experimental evidences of thermal spreading of tungsten oxide on zirconia

Fraga, Marco A.; Esteves, A.M.L.; Appel, Lucia G.

doi:10.1016/j.apsusc.2008.03.175

Cited by 1 publication

(2 citation statements)

References 15 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…47 Such an approach could be transposed to the thermal spreading of WO 3 on ZrO 2 . 48,49 This study aims at establishing a reliable tool to estimate surface coverage of ZrO 2 by another oxide as well as the accessible surface of ZrO 2 nanoparticles supported on a porous oxide. Results for WO x -ZrO 2 (ZrO 2 as oxide support) and ZrO 2 / SBA-15 (ZrO 2 as supported oxide) materials are discussed.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, Baca et al have proposed to use the thermal spreading (i.e., the spontaneous dispersion of an oxide on the surface of another oxide under the effect of a thermal treatment , ) of MoO 3 to characterize the dispersion of alumina in an Al 2 O 3 /SBA-15 material . Such an approach could be transposed to the thermal spreading of WO 3 on ZrO 2 . , …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials

et al. 2010

View full text Add to dashboard Cite

NO x adsorption-desorption experiments were carried out on a series of W-free and W-containing ZrO 2 samples. To the best of our knowledge, this study establishes for the first time NO x -TPD (temperature-programmed desorption of NO x ) as a reliable method to estimate the accessible ZrO 2 surface of complex oxides. The NO x uptake by ZrO 2 was found to be 5.8 ( 0.2 µmol/m 2 . On the tungstated zirconia series of samples, the NO x uptake decreases linearly with W density up to about 5 W/nm 2 , which is in excellent agreement with literature data for which the pseudo monolayer coverage was obtained by spectroscopic methods. The accessible ZrO 2 surface area of ZrO 2 /SBA-15 materials, which cannot be ascertained through common spectroscopic methods, was estimated by WO 3 thermal spreading and the NO x -TPD method. Both values compare very well but NO x -TPD, unlike WO 3 thermal spreading, does not alter the integrity of the investigated sample as the sample is pretreated at lower temperatures (500 instead of 700°C).

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials

et al. 2010

View full text Add to dashboard Cite

show abstract

Further experimental evidences of thermal spreading of tungsten oxide on zirconia

Cited by 1 publication

References 15 publications

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials

Contact Info

Product

Resources

About

Further experimental evidences of thermal spreading of tungsten oxide on zirconia

Cited by 1 publication

References 15 publications

NOx-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO2-Containing Materials

NOx-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO2-Containing Materials

Contact Info

Product

Resources

About

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials

NO_x-TPD as a Tool to Estimate the Accessible Zirconia Surface of ZrO₂-Containing Materials