Hydrogen interactions and catalytic properties of platinum-tin supported on zinc aluminate

G. Aguilar-Ríos; M. Valenzuela; P. Salas; H. Armendáriz; P. Bosch; G. Del Toro; R. Silva; V. Bertín; S. Castillo; A. Ramírez-Solís; I. Schifter

doi:10.1016/0926-860X(95)00269-3

Hydrogen interactions and catalytic properties of platinum-tin supported on zinc aluminate

G. Aguilar-Ríos, M. Valenzuela, P. Salas, H. Armendáriz, P. Bosch, G. Del Toro, R. Silva, V. Bertín, S. Castillo, A. Ramírez-Solís, I. Schifter

Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE)

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

Pt-Sn/ZnAl₂O₄ catalysts prepared by two-step impregnation (first tin), with a Sn/Pt atomic ratio ranging from zero to 6.72, were characterized by hydrogen chemisorption, temperature-programmed reduction and tested in isobutane dehydrogenation. Metal dispersion correlates linearly with reaction rate; both parameters reach a maximum when the Sn/Pt atomic ratio is about one. The activity of the sites capable of hydrogen chemisorption, as expressed in turnover frequency number, TOF, decrease as the tin concentration is increased. From theoretical ab-inito calculations, it is proposed that tin reduces the platinum-hydrogen charge transfer responsible for hydrogen dissociation through an orbital overlapping.

Original language	English
Pages (from-to)	65-75
Number of pages	11
Journal	Applied Catalysis A: General
Volume	127
Issue number	1-2
DOIs	https://doi.org/10.1016/0926-860X(95)00269-3
State	Published - 22 Jun 1995

Keywords

Dehydrogenation
Platinum-tin
Zinc aluminate spinel

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10.1016/0926-860X(95)00269-3

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title = "Hydrogen interactions and catalytic properties of platinum-tin supported on zinc aluminate",

abstract = "Pt-Sn/ZnAl2O4 catalysts prepared by two-step impregnation (first tin), with a Sn/Pt atomic ratio ranging from zero to 6.72, were characterized by hydrogen chemisorption, temperature-programmed reduction and tested in isobutane dehydrogenation. Metal dispersion correlates linearly with reaction rate; both parameters reach a maximum when the Sn/Pt atomic ratio is about one. The activity of the sites capable of hydrogen chemisorption, as expressed in turnover frequency number, TOF, decrease as the tin concentration is increased. From theoretical ab-inito calculations, it is proposed that tin reduces the platinum-hydrogen charge transfer responsible for hydrogen dissociation through an orbital overlapping.",

keywords = "Dehydrogenation, Platinum-tin, Zinc aluminate spinel",

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T1 - Hydrogen interactions and catalytic properties of platinum-tin supported on zinc aluminate

AU - Aguilar-Ríos, G.

AU - Valenzuela, M.

AU - Salas, P.

AU - Armendáriz, H.

AU - Bosch, P.

AU - Del Toro, G.

AU - Silva, R.

AU - Bertín, V.

AU - Castillo, S.

AU - Ramírez-Solís, A.

AU - Schifter, I.

PY - 1995/6/22

Y1 - 1995/6/22

N2 - Pt-Sn/ZnAl2O4 catalysts prepared by two-step impregnation (first tin), with a Sn/Pt atomic ratio ranging from zero to 6.72, were characterized by hydrogen chemisorption, temperature-programmed reduction and tested in isobutane dehydrogenation. Metal dispersion correlates linearly with reaction rate; both parameters reach a maximum when the Sn/Pt atomic ratio is about one. The activity of the sites capable of hydrogen chemisorption, as expressed in turnover frequency number, TOF, decrease as the tin concentration is increased. From theoretical ab-inito calculations, it is proposed that tin reduces the platinum-hydrogen charge transfer responsible for hydrogen dissociation through an orbital overlapping.

AB - Pt-Sn/ZnAl2O4 catalysts prepared by two-step impregnation (first tin), with a Sn/Pt atomic ratio ranging from zero to 6.72, were characterized by hydrogen chemisorption, temperature-programmed reduction and tested in isobutane dehydrogenation. Metal dispersion correlates linearly with reaction rate; both parameters reach a maximum when the Sn/Pt atomic ratio is about one. The activity of the sites capable of hydrogen chemisorption, as expressed in turnover frequency number, TOF, decrease as the tin concentration is increased. From theoretical ab-inito calculations, it is proposed that tin reduces the platinum-hydrogen charge transfer responsible for hydrogen dissociation through an orbital overlapping.

KW - Dehydrogenation

KW - Platinum-tin

KW - Zinc aluminate spinel

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DO - 10.1016/0926-860X(95)00269-3

M3 - Artículo

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VL - 127

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EP - 75

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

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ER -

Hydrogen interactions and catalytic properties of platinum-tin supported on zinc aluminate

Abstract

Keywords

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