OSCILLATIONS OF CO AND CO+H-2 OXIDATION IN AIR OVER SUPPORTED AND UNSUPPORTED PT CATALYSTS

被引：6

作者：

DENG, YQ

NEVELL, TG

JONES, MG

机构：

[1] UNIV PORTSMOUTH,DEPT CHEM,PORTSMOUTH PO1 2DT,HANTS,ENGLAND

[2] CITY TECHNOL LTD,PORTSMOUTH PO6 1SZ,HANTS,ENGLAND

来源：

CATALYSIS LETTERS | 1995年 / 34卷 / 3-4期

关键词：

OSCILLATION; CO + H-2 COOXIDATION; CHEMICAL SENSOR; PELLISTOR; PLATINUM; PLATINUM ALUMINA;

D O I：

10.1007/BF00806880

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：

Oscillation behaviour of the oxidation of CO (0.2-2.2%) in air over Pt wire coils and over Pt/Al2O3 catalysts deposited onto the coils (pellistors) has been investigated. The waveforms differ considerably between the two catalytic systems. Over unsupported Pt at 240-260 degrees C, regular oscillations were accompanied by slowly declining activity and by deposition of carbon. Over supported Pt at 110-180 degrees C, relatively complex but sustained oscillation occurred by a different mechanism. This oscillation was greatly enhanced by H-2 (0.25-1.0%), and may involve fluctuations in the concentrations of CO and H-2 around the supported catalyst.

引用

页码：313 / 320

页数：8

共 35 条

[21] OSCILLATORY BEHAVIOR OF LONG AND SHORT ISOTHERMAL BEDS PACKED WITH PT/AL2O3 CATALYST [J].

RATHOUSKY, J ;

HLAVACEK, V .

JOURNAL OF CATALYSIS, 1982, 75 (01) :122-133

[22] INTRINSICALLY UNSTABLE BEHAVIOR DURING THE OXIDATION OF CARBON-MONOXIDE ON PLATINUM [J].

RAZON, LF ;

SCHMITZ, RA .

CATALYSIS REVIEWS-SCIENCE AND ENGINEERING, 1986, 28 (01) :89-164

[23] IMAGING OF SPATIOTEMPORAL PATTERN EVOLUTION DURING CARBON-MONOXIDE OXIDATION ON PLATINUM [J].

ROTERMUND, HH ;

ENGEL, W ;

KORDESCH, M ;

ERTL, G .

NATURE, 1990, 343 (6256) :355-357

[24] FTIR STUDIES OF CATALYST PREPARATION EFFECTS ON SPATIAL PROPAGATION OF OSCILLATIONS DURING CO OXIDATION ON PT/SIO2 [J].

SANT, R ;

WOLF, EE .

JOURNAL OF CATALYSIS, 1988, 110 (02) :249-261

[25] IR SPECTROSCOPIC INVESTIGATIONS DURING OSCILLATIONS OF THE CO/NO AND THE CO/O-2 REACTION ON PT AND PD CATALYSTS .1. PLATINUM [J].

SCHUTH, F ;

WICKE, E .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1989, 93 (02) :191-201

[26] OSCILLATORY REACTIONS IN HETEROGENEOUS CATALYSIS [J].

SCHUTH, F ;

HENRY, BE ;

SCHMIDT, LD .

ADVANCES IN CATALYSIS, VOL 39, 1993, 39 :51-127

[27] THE NO + CO REACTION ON CLEAN PT(100) - MULTIPLE STEADY-STATES AND OSCILLATIONS [J].

SCHWARTZ, SB ;

SCHMIDT, LD .

SURFACE SCIENCE, 1988, 206 (1-2) :169-186

[28]

SCOTT SK, 1991, CHEM CHAOS, pCH9

[29] REACTION-RATE OSCILLATIONS DURING PROPYLENE OXIDATION ON PLATINUM [J].

SHEINTUCH, M ;

LUSS, D .

JOURNAL OF CATALYSIS, 1981, 68 (01) :245-248

[30] OSCILLATIONS DURING THE INTERACTION BETWEEN CARBON-MONOXIDE AND OXYGEN ON PALLADIUM-CONTAINING CATALYSTS [J].

TENCHEV, KK ;

PETROV, LA ;

SAVELIEVA, GA ;

SASS, AS .

APPLIED CATALYSIS A-GENERAL, 1992, 83 (01) :31-43

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