MOSSBAUER-SPECTROSCOPY STUDIES OF SN-PT/AL2O3 CATALYSTS PREPARED BY CONTROLLED SURFACE-REACTIONS

被引：67

作者：

VERTES, C

TALAS, E

CZAKONAGY, I

RYCZKOWSKI, J

GOBOLOS, S

VERTES, A

MARGITFALVI, J

机构：

[1] HUNGARIAN ACAD SCI, CENT RES INST CHEM, H-1525 BUDAPEST, HUNGARY

[2] EOTVOS LORAND UNIV, NUCL CHEM LAB, H-1518 BUDAPEST, HUNGARY

来源：

APPLIED CATALYSIS | 1991年 / 68卷 / 1-2期

关键词：

TIN-PLATINUM ALUMINA; MOSSBAUER SPECTROSCOPY; CONTROLLED SURFACE REACTIONS; CATALYST CHARACTERIZATION (MOSSBAUER SPECTROSCOPY);

D O I：

10.1016/S0166-9834(00)84099-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mossbauer spectroscopy was used to study the chemical state of tin in a new type of Sn-Pt/Al2O3 catalysts. Controlled surface reaction of tin tetraethyl with hydrogen preadsorbed on platinum resulted in the exclusive formation of a Pt-SnEt3 surface complex, which decomposed in hydrogen at 773 K to Pt(x)Sn alloy (3 < x < 4). Contamination of the catalyst by air at room temperature resulted in partial oxidation of tin in the alloy to SnO2. Upon oxidation at 673 K tin segregated to SnO2. Both SnO2 and Pt(x)Sn alloy were detected in the reduced catalyst. Anchoring SnCl2 onto lithiated Pt/Al2O3 and subsequent reduction of the catalyst in hydrogen did not result in the formation of tin-platinum alloy, indicating an exclusive tin-alumina interaction.

引用

页码：149 / 159

页数：11

共 27 条

[1] THE CHEMICAL-STATE OF TIN IN PLATINUM TIN ALUMINA CATALYSTS
ADKINS, SR
DAVIS, BH
[J]. JOURNAL OF CATALYSIS, 1984, 89 (02) : 371 - 379
[2] MOSSBAUER-SPECTRA INVESTIGATION OF THE ROLE OF TIN IN PLATINUM-TIN REFORMING CATALYSTS
BACAUD, R
BUSSIERE, P
FIGUERAS, F
[J]. JOURNAL OF CATALYSIS, 1981, 69 (02) : 399 - 409
[3] STATE OF METALLIC PHASE IN PT-SN/AL2O3 CATALYSTS PREPARED BY DIFFERENT DEPOSITION TECHNIQUES
BARONETTI, GT
DEMIGUEL, SR
SCELZA, OA
CASTRO, AA
[J]. APPLIED CATALYSIS, 1986, 24 (1-2): : 109 - 116
[4] MOSSBAUER-SPECTROMETRIC AND CATALYTIC INVESTIGATIONS OF SYSTEM PT-SN-ETA-AL2O3
BERNDT, H
MEHNER, H
VOLTER, J
MEISEL, W
[J]. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1977, 429 (02): : 47 - 58
[5] PLATINUM-TIN REFORMING CATALYSTS .1. THE OXIDATION-STATE OF TIN AND THE INTERACTION BETWEEN PLATINUM AND TIN
BURCH, R
[J]. JOURNAL OF CATALYSIS, 1981, 71 (02) : 348 - 359
[6] CONVERSION OF N-HEXANE OVER MONO-FUNCTIONAL SUPPORTED AND UNSUPPORTED PTSN CATALYSTS
DAUTZENBERG, FM
HELLE, JN
BILOEN, P
SACHTLER, WMH
[J]. JOURNAL OF CATALYSIS, 1980, 63 (01) : 119 - 128
[7] GREENWOOD NN, 1971, MOSSBAUER SPECTROSCO, P40
[8] HAYES JC, 1972, Patent No. 2113520
[9] ESCA STUDY OF THE OXIDATION OF PT3SN .2. EXPOSURE TO AIR
HOFLUND, GB
ASBURY, DA
[J]. LANGMUIR, 1986, 2 (06) : 695 - 697
[10] AN AES (SAM), ESCA AND ISS STUDY OF THE OXIDATION OF PT3/SN .1. LOW-PRESSURE EXPOSURE TO O2
HOFLUND, GB
ASBURY, DA
KIRSZENSZTEJN, P
LAITINEN, HA
[J]. SURFACE AND INTERFACE ANALYSIS, 1986, 9 (1-6) : 169 - 173

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