Spectroscopic Studies on ZrO2 Modified with MoO3 and Activity for Acid Catalysis 


Vol. 24,  No. 12, pp. 1785-1792, Dec.  2003
10.5012/bkcs.2003.24.12.1785


PDF
  Abstract

Zirconia modified with Mo3 was prepared by impregnation of powdered Zr(OH4 with ammonium heptamolybdate aqueous solution followed by calcining in air at high temperature. Spectroscopic studies on prepared catalysts were performed by using FTIR, Raman, XRD, and DSC and by measuring surface area. Upon the addition of molybdenum oxide to zirconia up to 15 wt%, the specific surface area increased in proportion to the molybdate oxide content, while acidity measured by irreversible chemisorption of ammonia exhibited a maximum value at 3 wt% of Mo3. Since the Zr2 stabilizes the molybdenum oxide species, for the samples equal to or less than 30 wt%, molybdenum oxide was well dispersed on the surface of zirconia and no phase of crystalline Mo3 was observed at any calcination temperature above 400 ℃. The catalytic activities for cumene dealkylation were roughly correlated with the acidity of catalysts measured by ammonia chemisorption method, while the catalytic activities for 2-propanol dehydration were not correlated with the acidity because weak acid sites are necessary for the reaction.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

J. R. Sohn, E. W. Chun, Y. I. Pae, "Spectroscopic Studies on ZrO2 Modified with MoO3 and Activity for Acid Catalysis," Bulletin of the Korean Chemical Society, vol. 24, no. 12, pp. 1785-1792, 2003. DOI: 10.5012/bkcs.2003.24.12.1785.

[ACM Style]

Jong Rack Sohn, Eun Woo Chun, and Young Il Pae. 2003. Spectroscopic Studies on ZrO2 Modified with MoO3 and Activity for Acid Catalysis. Bulletin of the Korean Chemical Society, 24, 12, (2003), 1785-1792. DOI: 10.5012/bkcs.2003.24.12.1785.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)

ISSN(Print) 0253-2964
ISSN(Online) 1229-5949