FTIR study of low-temperature CO adsorption on Cu/silicalite-1

被引：28

作者：

Hadjiivanov, K ^{[1
]}

Knözinger, H

Milushev, A

机构：

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

[2] Univ Munich, Dept Chem, D-81377 Munich, Germany

来源：

CATALYSIS COMMUNICATIONS | 2002年 / 3卷 / 01期

关键词：

FTIR spectroscopy; silicalite-1; Cu/silicalite-1; Cu/MFI; adsorption; carbon monoxide;

D O I：

10.1016/S1566-7367(01)00067-X

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：

Adsorption of CO on Cu/silicalite reveals the existence of Cu+ sites similar in properties to the Cu+ cations exchanged in Cu-ZSM-5. In both cases CU+(CO)(2) dicarbonyls are formed at ambient temperature and under CO equilibrium pressure. These species are converted into monocarbonyls after evacuation. At low temperature, as with Cu-ZSM-5, tricarbonyls are formed on part of the Cu+ sites on Cu/silicalite-1. However, the polycarbonyls on the Cu/ silicalite-1 sample are less stable as compared to Cu-ZSM-5. In addition, a fraction of Cu+ sites rather typical for oxide-supported copper is found with Cu/silicalite-1. The location of the different copper cations in Cu/silicalite-1 is discussed. (C) 2002 Published by Elsevier Science B.V.

引用

页码：37 / 44

页数：8

共 22 条

[1] USE OF COMBINATION-MODES AND OVERTONES OF METAL-CARBONYLS FOR THE IR STUDY OF CATION STATES IN ZEOLITES - COPPER(I) CARBONYLS IN REDUCED CUNAY ZEOLITES [J].

BOROVKOV, VY ;

KARGE, HG .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (13) :2035-2039

[2] Reducibility and oxidation activity of Cu ions in zeolites -: Effect of Cu ion coordination and zeolite framework composition [J].

Bulánek, R ;

Wichterlová, B ;

Sobalík, Z ;

Tichy, J .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 31 (01) :13-25

[3] Determination of the dispersion and surface oxidation states of supported Cu catalysts [J].

Dandekar, A ;

Vannice, MA .

JOURNAL OF CATALYSIS, 1998, 178 (02) :621-639

[4] SITING AND REDOX BEHAVIOR OF CU IONS IN CUH-ZSM-5 ZEOLITES - CU+ PHOTOLUMINESCENCE STUDY [J].

DEDECEK, J ;

WICHTERLOVA, B .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (22) :5721-5727

[5] COORDINATION OF CU IONS IN HIGH-SILICA ZEOLITE MATRICES - CU+ PHOTOLUMINESCENCE, IR OF NO ADSORBED ON CU2+, AND CU2+ ESR STUDY [J].

DEDECEK, J ;

SOBALIK, Z ;

TVARUZKOVA, Z ;

KAUCKY, D ;

WICHTERLOVA, B .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (44) :16327-16337

[6] AN INFRARED SPECTROSCOPIC STUDY OF THE ADSORPTION OF CARBON-MONOXIDE ON SILICA-SUPPORTED COPPER PARTICLES [J].

DEJONG, KP ;

GEUS, JW ;

JOZIASSE, J .

APPLIED SURFACE SCIENCE, 1980, 6 (3-4) :273-287

[7] FTIR study of low-temperature CO and 15N2 adsorption on a CaNaY zeolite:: formation of site-specified Ca2+(CO)3 and Ca2+(15N2)3 complexes [J].

Hadjiivanov, K ;

Knözinger, H ;

Ivanova, E ;

Dimitrov, L .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (12) :2531-2536

[8] FTIR spectroscopic study of CO adsorption on CU/SiO2:: formation of new types of copper carbonyls [J].

Hadjiivanov, K ;

Venkov, T ;

Knözinger, H .

CATALYSIS LETTERS, 2001, 75 (1-2) :55-59

[9] Formation of Ca2+(CO)3 complexes during low-temperature CO adsorption on CaNaY zeolite [J].

Hadjiivanov, K ;

Knözinger, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (20) :4531-4534

[10] FTIR study of CO and NO adsorption and coadsorption on a Cu/SiO2 catalyst:: Probing the oxidation state of copper [J].

Hadjiivanov, K ;

Knözinger, H .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (06) :1132-1137

← 1 2 3 →