Study of Silica Supported PtxNi1-x Catalysts by Ion Scattering Spectroscopy

Martine Borrell; Andreas Jentys; Peter Varga

doi:10.1007/bf01246216

Study of Silica Supported Pt_xNi_1-x Catalysts by Ion Scattering Spectroscopy

Martine Borrell, Andreas Jentys, Peter Varga

Technical University of Vienna

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

1 Scopus citations

Abstract

As supported Pt_xNi_1-x catalysts are used for hydrogenation reactions, it seemed necessary to assess the surface composition of the reduced samples. To approach the usual reduction conditions we applied in situ reduction in a reaction chamber (1 mbar H₂ up to 500°C) placed in ultra high vacuum recipient (UHV: 10^-9 to 2.10^-10 mbar). All ion scattering spectroscopy measurements were performed in UHV. Charging of the samples was avoided by electron bombardment (5eV). The variation of the surface composition was determined after subsequent sputtering, thermal treatment at 500°C and during oxygen adsorption. A comparison with previous results of surface compositions of binary alloys (polycrystalline foils [1, 2] and single crystals Pt_xNi_1-x [3]) is given.

Original language	English
Pages (from-to)	389-393
Number of pages	5
Journal	Mikrochimica Acta
Volume	125
Issue number	1
DOIs	https://doi.org/10.1007/bf01246216
State	Published - 1997
Externally published	Yes

Keywords

Ion scattering spectroscopy
Ni
Pt
SiO
Supported catalysts

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10.1007/bf01246216

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abstract = "As supported PtxNi1-x catalysts are used for hydrogenation reactions, it seemed necessary to assess the surface composition of the reduced samples. To approach the usual reduction conditions we applied in situ reduction in a reaction chamber (1 mbar H2 up to 500°C) placed in ultra high vacuum recipient (UHV: 10-9 to 2.10-10 mbar). All ion scattering spectroscopy measurements were performed in UHV. Charging of the samples was avoided by electron bombardment (5eV). The variation of the surface composition was determined after subsequent sputtering, thermal treatment at 500°C and during oxygen adsorption. A comparison with previous results of surface compositions of binary alloys (polycrystalline foils [1, 2] and single crystals PtxNi1-x [3]) is given.",

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AU - Borrell, Martine

AU - Jentys, Andreas

AU - Varga, Peter

PY - 1997

Y1 - 1997

N2 - As supported PtxNi1-x catalysts are used for hydrogenation reactions, it seemed necessary to assess the surface composition of the reduced samples. To approach the usual reduction conditions we applied in situ reduction in a reaction chamber (1 mbar H2 up to 500°C) placed in ultra high vacuum recipient (UHV: 10-9 to 2.10-10 mbar). All ion scattering spectroscopy measurements were performed in UHV. Charging of the samples was avoided by electron bombardment (5eV). The variation of the surface composition was determined after subsequent sputtering, thermal treatment at 500°C and during oxygen adsorption. A comparison with previous results of surface compositions of binary alloys (polycrystalline foils [1, 2] and single crystals PtxNi1-x [3]) is given.

AB - As supported PtxNi1-x catalysts are used for hydrogenation reactions, it seemed necessary to assess the surface composition of the reduced samples. To approach the usual reduction conditions we applied in situ reduction in a reaction chamber (1 mbar H2 up to 500°C) placed in ultra high vacuum recipient (UHV: 10-9 to 2.10-10 mbar). All ion scattering spectroscopy measurements were performed in UHV. Charging of the samples was avoided by electron bombardment (5eV). The variation of the surface composition was determined after subsequent sputtering, thermal treatment at 500°C and during oxygen adsorption. A comparison with previous results of surface compositions of binary alloys (polycrystalline foils [1, 2] and single crystals PtxNi1-x [3]) is given.

KW - Ion scattering spectroscopy

KW - Ni

KW - Pt

KW - SiO

KW - Supported catalysts

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JO - Mikrochimica Acta

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ER -

Study of Silica Supported Pt_xNi_1-x Catalysts by Ion Scattering Spectroscopy

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Keywords

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