IN-SITU FTIR AND UV/VIS SPECTROSCOPIC STUDY OF THE GENERATION OF ANIONIC PT-CARBONYL COMPLEXES WITHIN A FAUJASITE MATRIX

被引：22

作者：

SCHULZEKLOFF, G ^{[1
]}

LIPSKI, RJ ^{[1
]}

JAEGER, NI ^{[1
]}

HULSTEDE, P ^{[1
]}

KUBELKOVA, L ^{[1
]}

机构：

[1] ACAD SCI CZECH REPUBL,J HEYROVSKY INST PHYS CHEM & ELECTROCHEM,CR-18233 PRAGUE 8,CZECH REPUBLIC

来源：

CATALYSIS LETTERS | 1995年 / 30卷 / 1-4期

关键词：

ANIONIC PT-CARBONYL COMPLEXES; CO CHEMISORPTION ON PT; IR SPECTROSCOPY; UV/VIS DIFFUSE REFLECTANCE SPECTROSCOPY; FAUJASITES;

D O I：

10.1007/BF00813673

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：

The temporal generation of anionic platinum-carbonyl complexes in platinum ion-exchanged zeolites X and Y by reductive carbonylation at 10(5) Pa and 363 K is monitored by in situ UV/VIS and FTIR spectroscopy. A monomer [Pt-3(CO)(6)](2-), exhibiting bands at 318 and 456 nm in the UV/VIS spectra and at 1790 and 2025 cm(-1) in the FTIR spectra, is the only platinum/species formed in NaX. The monomer as well as oligomers are generated in NaY, where the formation of the latter species is due to the stronger acidity in the NaY as compared to NaX. The decomposition of the complexes results in the generation of Pt clusters of the size less than or equal to 1 nm.

引用

页码：65 / 75

页数：11

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