Characterization and selective oxidation catalysis of modified Pt particles on SbOx

Authors
Inoue, T Oyama, ST Imoto, H Asakura, K Iwasawa, Y
Citation
T. Inoue et al., Characterization and selective oxidation catalysis of modified Pt particles on SbOx, APP CATAL A, 191(1-2), 2000, pp. 131-140
Citations number
29
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
191
Issue
1-2
Year of publication
2000
Pages
131 - 140
Database
ISI
SICI code
0926-860X(20000124)191:1-2<131:CASOCO>2.0.ZU;2-8
Abstract
Characterization and catalytic performance of modified Pt on SbOx for the s elective oxidation of i-C4H10 and i-C4H8 to methacrolein are summarized and reconsidered in this paper. XRD revealed that the main oxide phase in Pt/S bOx catalysts under the reaction conditions was Sb6O13, while Raman spectro scopy also indicated the presence of small alpha-Sb2O3 crystallites (senarm ontite), forming on or around Pt particles, with small highly dispersed O = SbOy decorating the Pt surface. These species were responsible for breakin g up large Pt ensembles and suppressing the total oxidation reaction. Syner gistic combination of the modified Pt and the defect pyrochlore-type Sb6O13 was essential for the selective oxidation of i-C4H10. (C) 2000 Elsevier Sc ience B.V. All rights reserved.