State of copper species during N2O decomposition over Cu-ZSM-5

被引：4

作者：

Bossmann, SH

Ottaviani, MF

Turek, T

机构：

[1] UNIV KARLSRUHE,INST CHEM VERFAHRENSTECH,D-76128 KARLSRUHE,GERMANY

[2] UNIV KARLSRUHE,LEHRSTUHL UMWELTMESSTECH,ENGLER BUNTE INST,D-76128 KARLSRUHE,GERMANY

[3] UNIV FLORENCE,DIPARTIMENTO CHIM,LAB CHIM FIS INTERFASI,I-50121 FLORENCE,ITALY

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1997年 / 101卷 / 06期

关键词：

catalysis; chemical kinetics; spectroscopy; electron spin resonance;

D O I：

10.1002/bbpc.19971010615

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 state of copper species in Cu-ZSM-5 during isothermal oscillations in nitrous oxide decomposition was monitored by CW-ESR. A change in the copper oxidation state could not be observed. The prevailing species in the state of low activity is Cu2+(O-6).NO while in the more active state Cu2+(O-6).O-2 could be identified as intermediate. A simple set of reactions involving these species was proposed, which is able to explain the occurrence of oscillations and is in agreement with the experimental observations.

引用

收藏

页码：978 / 980

页数：3

相关论文

共 18 条

[1] Redox chemistry of Cu/ZSM-5 [J].

Beutel, T ;

Sarkany, J ;

Lei, GD ;

Yan, JY ;

Sachtler, WMH .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (02) :845-851

[2] NATURE OF ACTIVE SPECIES IN COPPER-BASED CATALYSTS AND THEIR CHEMISTRY OF TRANSFORMATION OF NITROGEN-OXIDES [J].

CENTI, G ;

PERATHONER, S .

APPLIED CATALYSIS A-GENERAL, 1995, 132 (02) :179-259

[3] ADSORPTION OF NITRIC OXIDE ON Y-TYPE ZEOLITES - LOW-TEMPERATURE INFRARED STUDY [J].

CHAO, CC ;

LUNSFORD, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1971, 93 (25) :6794-&

[4] Oscillatory behaviour in nitrous oxide decomposition on over-exchanged Cu-ZSM-5 zeolite [J].

Ciambelli, P ;

Garufi, E ;

Pirone, R ;

Russo, G ;

Santagata, F .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1996, 8 (03) :333-341

[5] 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

[6] IN-SITU ESR MONITORING OF CUH-ZSM-5 UP TO 500-DEGREES-C IN FLOWING DRY MIXTURES OF NO(NO2), C3H6(C2H5OH), AND EXCESS O-2 [J].

KUCHEROV, AV ;

GERLOCK, JL ;

JEN, HW ;

SHELEF, M .

JOURNAL OF CATALYSIS, 1995, 152 (01) :63-69

[7] State of copper in a working, low-concentration CuH-ZSM-5 catalyst for exhaust gas purification: In-situ ESR monitoring [J].

Kucherov, AV ;

Gerlock, GL ;

Jen, HW ;

Shelef, M .

CATALYSIS TODAY, 1996, 27 (1-2) :79-84

[8] IDENTIFICATION OF COPPER(II) AND COPPER(I) AND THEIR INTERCONVERSION IN CU/ZSM-5 DE-NOX CATALYSTS [J].

LEI, GD ;

ADELMAN, BJ ;

SARKANY, J ;

SACHTLER, WMH .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 5 (03) :245-256

[9] TEMPERATURE-PROGRAMMED DESORPTION OF NITRIC-OXIDE OVER CU-ZSM-5 [J].

LI, YJ ;

ARMOR, JN .

APPLIED CATALYSIS, 1991, 76 (02) :L1-L8

[10] CATALYTIC DECOMPOSITION OF NITROUS-OXIDE ON METAL EXCHANGED ZEOLITES [J].

LI, YJ ;

ARMOR, JN .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1992, 1 (03) :L21-L29