Počet záznamů: 1

Effect of the particle size and surface area of tungstated zirconia on the WOx nuclearity and n-heptane isomerization over Pt/WO3–ZrO2

SYSNO ASEP	0358979
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Effect of the particle size and surface area of tungstated zirconia on the WOx nuclearity and n-heptane isomerization over Pt/WO3–ZrO2
Tvůrce(i)	Kaucký, Dalibor (UFCH-W)_{RID, ORCID} Wichterlová, Blanka (UFCH-W)_RID Dědeček, Jiří (UFCH-W)_{RID, ORCID} Sobalík, Zdeněk (UFCH-W)_RID Jakubec, Ivo (UACH-T)_{SAI, RID, ORCID}
Zdroj.dok.	Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X Roč. 397, 1-2 (2011), s. 82-93
Poč.str.	12 s.
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	n-heptane isomeration ; Pt/WO3-ZrO2 ; nano ZrO2
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
CEP	KAN100400702 GA AV ČR - Akademie věd
CEZ	AV0Z40320502 - UACH-T (2005-2011)
	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000290841300010
DOI	10.1016/j.apcata.2011.02.020
Anotace	Four series of tungstated zirconia of different surface area ranging from 100 to 20 m2 g−1 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 isomerization proceeds 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 cm−1, intensity of which depended on the surface area, crystal size and WO3 loading.
Pracoviště	Ústav fyzikální chemie J.Heyrovského
Kontakt	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Rok sběru	2012

Počet záznamů: 1