Characterization and hydrocarbon oxidation activity of coprecipitated mixed oxides Mn3O4/Al2O3

被引：93

作者：

Finocchio, E ^{[1
]}

Busca, G ^{[1
]}

机构：

[1] Univ Genoa, Dipartimento Ingn Chim & Proc, I-16129 Genoa, Italy

来源：

CATALYSIS TODAY | 2001年 / 70卷 / 1-3期

关键词：

Mn3O4/Al2O3; FT-IR spectroscopy; oxidation catalysts;

D O I：

10.1016/S0920-5861(01)00419-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The surface and redox properties of the manganese oxides Mn3O4 (hausmannite), Mn2O3 (bixbyite) and MnO2 (pyrolusite) and of coprecipitated manganese aluminum Mn3O4/Al2O3 mixed oxide catalysts have been investigated by FT-IR spectroscopy of adsorbed probe molecules methanol and pyridine. Methoxy groups interacting with Mn3+, Mn2+ and Al3+ cations are well distinguishable with respect to the position of their C-O stretching band. The evolution of methoxy groups to formate species allows to obtain information on the reducibility of the surfaces. Also pyridine allows to distinguish such sites and to evaluate their surface acidity. The results concerning the catalytic oxidation of propane over these materials are discussed in relation to their surface properties. The effect of bulk oxygen diffusion rate on the catalytic oxidation rate is evident. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：213 / 225

页数：13

共 35 条

[1] An FTIR study of surface ceria hydroxy groups during a redox process with H-2
Badri, A
Binet, C
Lavalley, JC
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (23): : 4669 - 4673
[2] Use of methanol as an IR molecular probe to study the surface of polycrystalline ceria
Badri, A
Binet, C
Lavalley, JC
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (06): : 1159 - 1168
[3] Use of methanol as an IR molecular probe to study the surface chlorination of ceria
Badri, A
Binet, C
Lavalley, JC
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (11): : 2121 - 2124
[4] Evaluation of the mechanism of the oxy-dehydrogenation of propane over manganese oxide
Baldi, M
Finocchio, E
Pistarino, C
Busca, G
[J]. APPLIED CATALYSIS A-GENERAL, 1998, 173 (01) : 61 - 74
[5] Catalytic combustion of C3 hydrocarbons and oxygenates over Mn3O4
Baldi, M
Finocchio, E
Milella, F
Busca, G
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 16 (01) : 43 - 51
[6] BALDI M, 1997, APPL CATAL A-GEN, V4010, P1
[7] INFRARED STUDY OF ALCOHOL ABSORPTION SITES ON ALUMINUM
BENAISSA, M
SAUR, O
LAVALLEY, JC
[J]. MATERIALS CHEMISTRY, 1982, 7 (05): : 699 - 714
[8] INFRARED STUDY OF ALCOHOLS ADSORPTION ON ZIRCONIUM-OXIDE - REACTIVITY OF ALKOXY SPECIES TOWARDS CO2
BENSITEL, M
MORAVEK, V
LAMOTTE, J
SAUR, O
LAVALLEY, JC
[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1987, 43 (12) : 1487 - 1491
[9] INTERMEDIATE SPECIES ON ZIRCONIA SUPPORTED METHANOL AEROGEL CATALYSTS .5. ADSORPTION OF METHANOL
BIANCHI, D
CHAFIK, T
KHALFALLAH, M
TEICHNER, SJ
[J]. APPLIED CATALYSIS A-GENERAL, 1995, 123 (01) : 89 - 110
[10] A SPECTROSCOPIC CHARACTERIZATION OF THE REDUCTION OF CERIA FROM ELECTRONIC-TRANSITIONS OF INTRINSIC POINT-DEFECTS
BINET, C
BADRI, A
LAVALLEY, JC
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (25) : 6392 - 6398

← 1 2 3 4 →