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ID 116401
Author
Kurimoto, Akihito Tokushima University
Keywords
Ga2O3
ZrO2
solid solution
catalyst
2-butanol dehydrogenation
XANES
EXAFS
XRD
Content Type
Journal Article
Description
Group 2, 3, and 13 element-doped zirconium oxide catalysts M-ZrO2 (M = Mg, Sr, Y, La, Ce, Sm, Er, Yb, B, Al, Ga, In, and Tl; 5 mol%) were prepared by impregnation of each metal salt aqueous solution on amorphous zirconium hydroxide, followed by calcination at 773 K. The M-ZrO2 samples were characterized by the catalytic performance of 2-butanol decomposition at 573 K, XRD, XANES and EXAFS spectroscopic techniques. Detailed analyses were performed herein for a series of Ga–ZrO2 with various doping amounts in the range of 1 – 60 mol%. The addition of Group 2 and 3 elements little influenced the catalytic performance of ZrO2 itself to promote dehydration to produce 1-butene with 90% selectivity. Ga–ZrO2 and In–ZrO2 gave methyl ethyl ketone as the main product via dehydrogenation. The doped Ga ion mainly existed inside the bulk of zirconia by forming the GaxZr1–xO2 solid solution up to 5 mol%. Highly doped species more than 10 mol% aggregated to form ε-Ga2O3. Each fraction forming the solid solution and Ga2O3-like species was evaluated by XANES analysis.
Journal Title
Analytical Sciences
ISSN
13482246
09106340
NCID
AA10500785
Publisher
The Japan Society for Analytical Chemistry
Volume
36
Issue
1
Start Page
41
End Page
46
Published Date
2020-01-10
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Publisher
departments
Science and Technology