caa a22 4500 475844688 CHVBK 20180406123910.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1019112017065 doi (NATIONALLICENCE)springer-10.1023/A:1019112017065 A study of the acidic and catalytic properties of pure and sulfated zirconia-titania and zirconia-silica mixed oxides [Elektronische Daten] [R. Barthos, F. Lónyi, J. Engelhardt, J. Valyon] Protonated pyridine (PyH+) was not found on ZrO2 (Z) or ZrO2-TiO2 (ZT), but was detected on sulfated oxides (Z‐S, ZT‐S) by IR spectroscopy. In contrast, ZrO2-SiO2 samples containing about 30-80 mol% ZrO2 showed Brønsted acidity both in non‐sulfated (ZS) and sulfated (ZS‐S) forms. The total acidity was determined by NH3‐TPD. Introduction of sulfate ions increased the site‐specific catalytic activity (TOF) in the conversion of cyclopropane or n‐hexane. The effect of sulfate ions was more significant on samples rich in zirconia. Results suggest that Zr is homogeneously distributed in ZS samples rich in silica. Zirconia‐bound dimeric sulfate, generating strong acidity, could not be formed in these preparations due to the absence of fairly large ZrO2 domains. Kluwer Academic Publishers, 2000 ZrO2-TiO2 and ZrO2-SiO2 nationallicence pure and sulfated, acidity of nationallicence isomerization nationallicence of cyclopropane nationallicence of n ‐hexane nationallicence Barthos R. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut Lónyi F. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut Engelhardt J. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut Valyon J. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 79-87 1022-5528 10:1-2<79 2000 10 11244 https://doi.org/10.1023/A:1019112017065 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1019112017065 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Barthos R. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut NATIONALLICENCE 700 1- Lónyi F. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut NATIONALLICENCE 700 1- Engelhardt J. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut NATIONALLICENCE 700 1- Valyon J. Institute of Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H‐1525 Budapest, PO Box 17, Hungary aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 10/1-2(2000-03-01), 79-87 1022-5528 10:1-2<79 2000 10 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer