The Catalytic Activity for CO Oxidation and Characterization of Perovskite-type Oxides Catalysts La1+x/2Sr1-x/2Co1-xCuxO3

被引：2

作者：

Li Xuyuan ^{[1
]}

Zhang Ziping ^{[1
]}

Ma Jiantai ^{[1
]}

Zhu Zongzhen ^{[1
]}

Men Yimin ^{[1
]}

机构：

[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 1996年 / 12卷 / 06期

关键词：

Perovskite-type oxide; CO oxidation; Active oxygen species; Lattice oxygen defect; Catalysts;

D O I：

10.3866/PKU.WHXB19960605

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 catalytic activity and the reactive properties of perovskite-type oxides catalysts La1+x/2Sr1-x/2Co1-xCuxO3 for CO oxidation reaction were investigated. Results showed that the catalytic activity for CO oxidation reached to a maximum when x=0.4. The temperature for complete CO oxidation under atmospheric and experimental conditions was 168 degrees C. According to the stoicheometry of catalyst, all catalysts were oxygen defect compounds. The active oxygen species on this catalyst was the adsorbed oxygen which was adsorbed on the surface lattice oxygen defect. It was also found that Co4+ existed in the catalysts and the sufrace active oxygen species was caused by the Co4+. It was concluded that CO oxidation reaction on this catalyst was carried out by the valence change between Co3+ and Co4+ which was adjusted by the adsorbed oxygen.

引用

页码：502 / 507

页数：6

共 12 条

[1]

BOURZUTSCHKY JAB, 1990, J CATAL, V124, P52

[2] AN IMPROVEMENT ON THE PREPARATION OF LA-SR-CO PEROVSKITE BY THE OXALATE METHOD [J].

CHANG, CC ;

WENG, HS .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1992, 31 (07) :1615-1621

[3]

MIZUSAKI T, 1989, J SOLID STATE CHEM, V80, P102

[4] CATALYTIC PROPERTIES OF LA1-XAX'FEO3 (A' = SR,CE) AND LA1-XCEXCOO3 [J].

NITADORI, T ;

MISONO, M .

JOURNAL OF CATALYSIS, 1985, 93 (02) :459-466

[5] PREPARATION AND CHARACTERIZATION OF LAMN1-XCUXO3+LAMBDA PEROVSKITE OXIDES [J].

ROJAS, ML ;

FIERRO, JLG ;

TEJUCA, LG ;

BELL, AT .

JOURNAL OF CATALYSIS, 1990, 124 (01) :41-51

[6] STRUCTURE AND REACTIVITY OF PEROVSKITE-TYPE OXIDES [J].

TEJUCA, LG ;

FIERRO, JLG ;

TASCON, JMD .

ADVANCES IN CATALYSIS, 1989, 36 :237-328

[7] OXYGEN-SORPTIVE PROPERTIES AND DEFECT STRUCTURE OF PEROVSKITE-TYPE OXIDES [J].

TERAOKA, Y ;

YOSHIMATSU, M ;

YAMAZOE, N ;

SEIYAMA, T .

CHEMISTRY LETTERS, 1984, (06) :893-896

[8] OXYGEN-SORPTIVE PROPERTIES OF DEFECT PEROVSKITE-TYPE LA1-XSRXCO1-YFEYO3-DELTA [J].

TERAOKA, Y ;

ZHANG, HM ;

YAMAZOE, N .

CHEMISTRY LETTERS, 1985, (09) :1367-1370

[9] OXYGEN STOICHIOMETRY IN LAMN1-XCUXO3+Y BY THERMOGRAVIMETRY [J].

VOGEL, EM ;

JOHNSON, DW ;

GALLAGHER, PK .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1977, 60 (1-2) :31-33

[10]

WOLO A, 1957, J AM CHEM SOC, V79, P6365

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