Preparation and Characterization of Chromium Oxide Supported on Zirconia 


Vol. 13,  No. 6, pp. 605-612, Jun.  1992


PDF
  Abstract

Chromium oxide/zirconia catalysts were prepared by dry impregnation of powdered Zr(OH)4 with (NH4)2CrO4 aqueous solution. The characterization of prepared catalysts was performed using FTIR, XPS, XRD and DTA methods, and by the measurement of surface area. The addition of chromium oxide to zirconia shifted the transitions of ZrO2 from amorphous to tetragonal phase and from tetragonal to monoclinic phase to higher temperature due to the strong interaction between chromium oxide and zirconia, and the specific surface area of catalysts increased in proportion to the chromium oxide content. Since the ZrO2 stabilizes supported chromium oxide, chromium oxide was well dispersed on the surface of zirconia, and α-Cr2O3 was observed only at the calcination temperature above 1173 K. Upon the addition of only small amount of chromium oxide (1 wt% Cr) to ZrO2, both the acidity and acid strength of catalyst increased remarkably, showing the presence of two kinds of acid sites on the surface of CrOx/ZrO2-Bronsted and Lewis.

  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, S. G. Ryu, M. Y. Park, Y. I. Pae, "Preparation and Characterization of Chromium Oxide Supported on Zirconia," Bulletin of the Korean Chemical Society, vol. 13, no. 6, pp. 605-612, 1992. DOI: .

[ACM Style]

Jong Rack Sohn, Sam Gon Ryu, Man Young Park, and Young Il Pae. 1992. Preparation and Characterization of Chromium Oxide Supported on Zirconia. Bulletin of the Korean Chemical Society, 13, 6, (1992), 605-612. DOI: .

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