Self-sustained kinetic oscillations in CO oxidation over silica-supported Pt

被引：46

作者：

Carlsson, Per-Anders ^{[1
]}

Zhdanov, Vladimir P.

Skoglundh, Magnus

机构：

[1] Chalmers Univ Technol, Competence Ctr Catalysis, SE-41296 Gothenburg, Sweden

[2] Russian Acad Sci, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[3] Chalmers Univ Technol, SE-41296 Gothenburg, Sweden

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2006年 / 8卷 / 23期

关键词：

D O I：

10.1039/b602958b

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：

Isothermal self-sustained kinetic oscillations in CO oxidation over silica-supported Pt at near-atmospheric pressure were studied by combined in situ Fourier transform infrared spectroscopy and mass spectrometry. The use of a specially designed reactor and careful choice of the physical properties of the catalyst and reaction conditions made it possible to eliminate diffusion limitations, to determine the maximum CO oxidation rate per Pt site in the purely kinetic regime and to clarify the mechanism of the oscillations. Specifically, our results indicate that during the high reactive periods the reaction mainly occurs on the oxide surface.

引用

页码：2703 / 2706

页数：4

共 26 条

[1] Structure and reactivity of surface oxides on Pt(110) during catalytic CO oxidation [J].

Ackermann, MD ;

Pedersen, TM ;

Hendriksen, BLM ;

Robach, O ;

Bobaru, SC ;

Popa, I ;

Quiros, C ;

Kim, H ;

Hammer, B ;

Ferrer, S ;

Frenken, JWM .

PHYSICAL REVIEW LETTERS, 2005, 95 (25)

[2] HYDROTHERMAL STABILITY OF SILICA AS A SUPPORT FOR PLATINUM IN AN OXIDATION CATALYST [J].

AXELSSON, IM ;

LOWENDAHL, L ;

OTTERSTEDT, JE .

APPLIED CATALYSIS, 1988, 44 (1-2) :251-260

[3] Bistable mean-field kinetics of CO oxidation on Pt with oxide formation [J].

Carlsson, PA ;

Zhdanov, VP ;

Kasemo, B .

APPLIED SURFACE SCIENCE, 2005, 239 (3-4) :424-431

[4] A transient in situ FTIR and XANES study of CO oxidation over Pt/Al2O3 catalysts [J].

Carlsson, PA ;

Österlund, L ;

Thormählen, P ;

Palmqvist, A ;

Fridell, E ;

Jansson, J ;

Skoglundh, M .

JOURNAL OF CATALYSIS, 2004, 226 (02) :422-434

[5] KINETIC OSCILLATIONS IN THE PLATINUM-CATALYZED OXIDATION OF CO [J].

ERTL, G ;

NORTON, PR ;

RUSTIG, J .

PHYSICAL REVIEW LETTERS, 1982, 49 (02) :177-180

[6] Island formation during kinetic rate oscillations in the oxidation of CO over Pt/SiO2:: A transient Fourier transform infrared spectrometry study [J].

Fanson, PT ;

Delgass, WN ;

Lauterbach, J .

JOURNAL OF CATALYSIS, 2001, 204 (01) :35-52

[7] EXPERIMENTAL-EVIDENCE FOR AN OXIDATION - REDUCTION-MECHANISM IN RATE OSCILLATIONS OF CATALYTIC CO OXIDATION ON PT/SIO2 [J].

HARTMANN, N ;

IMBIHL, R ;

VOGEL, W .

CATALYSIS LETTERS, 1994, 28 (2-4) :373-381

[8] Bistability and oscillations in CO oxidation studied with scanning tunnelling microscopy inside a reactor [J].

Hendriksen, BLM ;

Bobaru, SC ;

Frenken, JWM .

CATALYSIS TODAY, 2005, 105 (02) :234-243

[9] CO oxidation on Pt(110): Scanning tunneling microscopy inside a high-pressure flow reactor [J].

Hendriksen, BLM ;

Frenken, JWM .

PHYSICAL REVIEW LETTERS, 2002, 89 (04) :1-046101

[10]

HUGO P, 1970, BERICH BUNSEN GESELL, V74, P121

← 1 2 3 →