Polycarbonyl species in Pt/H-ZSM-5:: FTIR spectroscopic study of 12CO-13CO co-adsorption

被引：37

作者：

Chakarova, K ^{[1
]}

Mihaylov, M ^{[1
]}

Hadjiivanov, K ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Gen & Inorgan Chem, BU-1113 Sofia, Bulgaria

来源：

CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

adsorption; carbon monoxide; (CO)-C-13; platinum; Pt-ZSM-5; polycarbonyls; FTIR spectroscopy;

D O I：

10.1016/j.catcom.2005.04.007

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：

In this work, we report on the formation of several non-classical carbonyls of platinum produced after CO adsorption on Pt/H-ZSM-5. These are: (i) two kinds of Pt3+(CO)(2) dicarbonyls (v(s) at 2212 cm(-1) and v(as) at 2176 cm(-1); v(s) at 2196 cm(-1) and v(as) at ca. 2155 cm(-1)), which are decomposed without producing monocarbonyls; (ii) Pt2+-Co (2150 cm(-1)), which form dicarbonyls at high CO coverages; (iii) Pt+(CO)(3) complexes (2161, 2153 and 2110 cm(-1)) which easily lose one CO ligand even at room temperature, being thus converted to Pt+(CO)2 (2122 and 2092 cm(-1)). The latter are thermally decomposed without producing monocarbonyls. In addition, carbonyls of metallic platinum have been found. (C) 2005 Elsevier B.V. All rights reserved.

引用

页码：466 / 471

页数：6

共 26 条

[1] γ-Al2O3-supported Pt-W catalysts prepared from molecular organometallic precursors:: Characterization by infrared spectroscopy [J].

Alexeev, OS ;

Graham, GW ;

Kim, DW ;

Shelef, M ;

Gates, BC .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (24) :5725-5733

[2] CARBON-MONOXIDE AS A SIGMA-DONOR LIGAND IN COORDINATION CHEMISTRY [J].

AUBKE, F ;

WANG, C .

COORDINATION CHEMISTRY REVIEWS, 1994, 137 :483-524

[3] Investigations of the dispersion of Pd in H-ZSM-5 [J].

Aylor, AW ;

Lobree, LJ ;

Reimer, JA ;

Bell, AT .

JOURNAL OF CATALYSIS, 1997, 172 (02) :453-462

[4] INTERACTION OF CO WITH PLATINUM SPECIES IN ZEOLITES - EVIDENCE FOR PLATINUM CARBONYLS IN PARTIALLY REDUCED ZEOLITE PTNAX [J].

BISCHOFF, H ;

JAEGER, NI ;

SCHULZEKLOFF, G ;

KUBELKOVA, L .

JOURNAL OF MOLECULAR CATALYSIS, 1993, 80 (01) :95-103

[5]

Braterman P.S., 1975, METAL CARBONYL SPECT

[6] Co-ordination chemistry of palladium cations in Pd-H-ZSM-5 as revealed by FTIR spectra of adsorbed and co-adsorbed probe molecules (CO and NO) [J].

Chakarova, K ;

Ivanova, E ;

Hadjiivanov, K ;

Klissurski, D ;

Knözinger, H .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2004, 6 (13) :3702-3709

[7]

CORNILS B, 2003, CATALYSIS A Z, P601

[8]

Cotton FA, 1980, ADV INORGANIC CHEM

[9] FTIR study of low-temperature CO adsorption on Y zeolite exchanged with Be2+, Mg2+, Ca2+, Sr2+ and Ba2+ cations [J].

Hadjiivanov, K ;

Ivanova, E ;

Knözinger, H .

MICROPOROUS AND MESOPOROUS MATERIALS, 2003, 58 (03) :225-236

[10] FTIR spectroscopic study of CO adsorption on Co-ZSM-5:: Evidence of formation of Co+(CO)4 species [J].

Hadjiivanov, K ;

Tsyntsarski, B ;

Venkov, T ;

Klissurski, D ;

Daturi, M ;

Saussey, J ;

Lavalley, JC .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2003, 5 (08) :1695-1702

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