Effect of the particle size and surface area of tungstated zirconia on the WOx nuclearity and n-heptane isomerization over Pt/WO3?ZrO2
Result description
Four series of tungstated zirconia of different surface area ranging from 100 to 20 m2 g1 and of micro- and nano-meter crystal size were investigated with respect to nuclearity and reducibility of WOx species, concentration of strong and weak acid sites,and n-heptane isomerization over Pt/WO3?ZrO2. The nuclearity of WOx species was analyzed by diffuse reflectance UV?Vis spectroscopy and their reducibility by TPR-H2. TPD of ammonia distinguished acid sites of different strengths. n-Heptane isomerizationproceeds over Pt/WO3?ZrO2 in hydrogen/nitrogen mixture at 250 °C. At least four types of WOx species differing in nuclearity were identified in tungstated zirconia by a maxima of absorption at 39 000, 35 000, 30 000 and 27 000 cm1, intensity of which depended on the surface area, crystal size and WO3 loading.
Keywords
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/61388980:_____/11:00358979
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Effect of the particle size and surface area of tungstated zirconia on the WOx nuclearity and n-heptane isomerization over Pt/WO3?ZrO2
Original language description
Four series of tungstated zirconia of different surface area ranging from 100 to 20 m2 g1 and of micro- and nano-meter crystal size were investigated with respect to nuclearity and reducibility of WOx species, concentration of strong and weak acid sites,and n-heptane isomerization over Pt/WO3?ZrO2. The nuclearity of WOx species was analyzed by diffuse reflectance UV?Vis spectroscopy and their reducibility by TPR-H2. TPD of ammonia distinguished acid sites of different strengths. n-Heptane isomerizationproceeds over Pt/WO3?ZrO2 in hydrogen/nitrogen mixture at 250 °C. At least four types of WOx species differing in nuclearity were identified in tungstated zirconia by a maxima of absorption at 39 000, 35 000, 30 000 and 27 000 cm1, intensity of which depended on the surface area, crystal size and WO3 loading.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
KAN100400702: Nanostructured materials for catalytic, electrocatalytic and sorption applications
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Catalysis A - General
ISSN
0926-860X
e-ISSN
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Volume of the periodical
397
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
82-93
UT code for WoS article
000290841300010
EID of the result in the Scopus database
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Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CF - Physical chemistry and theoretical chemistry
Year of implementation
2011