Sulfated Zirconia-Based Strong Solid-Acid Catalysts: Recent Progress

Song, Xuemin; Sayari, Abdelhamid

doi:10.1080/01614949608006462

Cited by 641 publications

(467 citation statements)

References 193 publications

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“…The introduction of metal ions reduces the amplitude of exothermic peaks and shifts them to a higher temperature. It is evident that the dopant presence retards significantly the processes as well documented in the literature [51,52]. The crystallization process is complex, and involves an arrangement which is different from the kinetic point of view than that observed in undoped zirconia.…”

Section: 7 293 7 Of 17mentioning

confidence: 68%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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ZrO 2 ·nH 2 O (hydrogel) impregnated with transition metals (Cu, Co, and Ni) was studied in this work as a precursor for the synthesis of CuO/ZrO 2 (CuZ), CoO x /ZrO 2 (CoZ), and NiO/ZrO 2 (NiZ) catalysts, employed in the naphthalene oxidation reaction. Fresh and catalytically used materials were characterized by different physicochemical techniques, to compare the bulk and surface behavior, with particular attention to the effect of the supported metal species' properties on the catalytic activity. Techniques such as X-ray diffraction (XRD), temperature programmed reduction (TPR), differential scanning calorimetry (DSC), Brunauer-Emmett-Teller (BET) surface area analyzer, diffuse reflectance spectroscopy (DRS UV-vis), and Raman spectroscopy, allow for establishing structural and textural aspects of the support, as well as the surface coordination and the accessibility of supported species. Results were in agreement with the CuZ > CoZ > NiZ sequence for the activity in naphthalene oxidation reaction. Electronic properties, ionic sizes, oxide phase deposition on the support surface, reducibility, metal-support interaction, and local site symmetry of metals seem to be decisive factors for the catalytic interaction with the gaseous phase.

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Section: 7 293 7 Of 17mentioning

confidence: 68%

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

et al. 2017

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“…[35][36][37]. The most convenient approach to synthesize these materials is based on the precipitation of amorphous hydrous zirconia gels in aqueous media using zirconium-containing precursors (e.g., zirconyl nitrate, zirconium alkoxides) and subsequent thermal or hydrothermal treatment of the resulting ZrO 2 xH 2 O gel [38,39].…”

Section: Introductionmentioning

confidence: 99%

Combined SANS and SAXS study of the action of ultrasound on the structure of amorphous zirconia gels

Gubanova

Baranchikov

Kopitsa

et al. 2015

Ultrasonics Sonochemistry

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In the present work, we have studied for the first time the combined effect of both sonication and precipitation pH on the structure of amorphous zirconia gels synthesized from zirconium(IV) propoxide. The techniques of small-angle neutron and X-ray scattering (SANS and SAXS) and low temperature nitrogen adsorption provided the integral data on the changes in the microstructure and mesostructure of these materials caused by ultrasonic treatment.Amorphous ZrO 2 ·xH 2 O synthesized under ultrasonic treatment was found to possess a very structured surface, characterized by the surface fractal dimension 2.9-3.0, compared to 2.3-2.5 for the non US-assisted synthesis, and it was also found to possess a higher specific surface area, while the sizes of the primary particles remain unchanged.

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“…In this context, the zirconia may be used either as a stabilizing additive to the Cu/ZnO(/Al 2 O 3 ) catalysts [1], or as an alternative support replacing for example, ZnO [2]. Zirconia modified with anions such as sulphate is an acid catalyst and became known for its extraordinary activity in low-temperature alkane isomerization [3]; it is also active for a number of other acid-catalysed reactions [4].…”

Section: Introductionmentioning

confidence: 99%

HRTEM observation of the monoclinic-to-tetragonal m-t) phase transition in nanocrystalline ZrO₂

Kasatkin

Girgsdies

Ressler

et al. 2004

Journal of Materials Science

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Sulfated Zirconia-Based Strong Solid-Acid Catalysts: Recent Progress

Cited by 641 publications

References 193 publications

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Combined SANS and SAXS study of the action of ultrasound on the structure of amorphous zirconia gels

HRTEM observation of the monoclinic-to-tetragonal m-t) phase transition in nanocrystalline ZrO₂

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Sulfated Zirconia-Based Strong Solid-Acid Catalysts: Recent Progress

Cited by 641 publications

References 193 publications

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Total Oxidation of Naphthalene with Zirconia-Supported Cobalt, Copper and Nickel Catalysts

Combined SANS and SAXS study of the action of ultrasound on the structure of amorphous zirconia gels

HRTEM observation of the monoclinic-to-tetragonal m-t) phase transition in nanocrystalline ZrO2

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HRTEM observation of the monoclinic-to-tetragonal m-t) phase transition in nanocrystalline ZrO₂