Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition-precipitation method

被引：33

作者：

Reddy, P. Siva Sankar ^{[1
]}

Pasha, Nayeem ^{[1
]}

Rao, M. G. V. Chalapathi ^{[1
]}

Lingaiah, N. ^{[1
]}

Suryanarayana, I. ^{[1
]}

Prasad, P. S. Sai ^{[1
]}

机构：

[1] Indian Inst Chem Technol, Inorgan & Phys Chem Div, Hyderabad 500007, Andhra Pradesh, India

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 09期

关键词：

N2O decomposition; temperature-programmed reduction; x-ray diffraction; ru catalyst; DRIFTS;

D O I：

10.1016/j.catcom.2006.11.039

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：

Alumina-supported ruthenium catalysts were prepared by the deposition-precipitation (DP) and impregnation (IMP) methods. The catalysts were characterized by BET surface area, X-ray diffraction, temperature-programmed reduction (TPR) and diffused reflectance infra-red spectroscopic (DRIFTS) techniques. The DP catalysts showed higher activity than their IMP analogues. The DRIFTS analysis revealed preferential formation of Run+ species on the surface of DP catalysts. Both Run+ and Ru-0 species appeared on IMP catalysts, with the composition of Ru-0 increasing with increase in metal loading. The temperatures at which the peak maxima appeared were higher in the TPR patterns of the DP catalysts, indicating greater interaction between Ru and alumina, which explained the formation of the cationic Ru species. The high activity of the catalysts prepared by DP method was related to the formation of electron deficient Ru sites during the preparation of the catalyst. (c) 2006 Published by Elsevier B.V.

引用

页码：1406 / 1410

页数：5

共 25 条

[1] CATALYTIC DECOMPOSITION OF NITROUS-OXIDE OVER RU-EXCHANGED ZEOLITES [J].

CHANG, YF ;

MCCARTY, JG ;

WACHSMAN, ED ;

WONG, VL .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1994, 4 (04) :283-299

[2] EFFECT OF RUTHENIUM-LOADING ON THE CATALYTIC ACTIVITY OF RU-NAZSM-5 ZEOLITES FOR NITROUS-OXIDE DECOMPOSITION [J].

CHANG, YF ;

MCCARTY, JG ;

WACHSMAN, ED .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 6 (01) :21-33

[3] CO CHEMISORPTION ON RU/SIO2 - THE INFLUENCE OF COADSORBATES [J].

CHEN, HW ;

ZHONG, Z ;

WHITE, JM .

JOURNAL OF CATALYSIS, 1984, 90 (01) :119-126

[4] FTIR studies of CO adsorption on Al2O3- and SiO2-supported Ru catalysts [J].

Chin, SY ;

Williams, CT ;

Amiridis, MD .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (02) :871-882

[5] Catalytic conversion of N2O to N2 over metal-based catalysts in the presence of hydrocarbons and oxygen [J].

Christoforou, SC ;

Efthimiadis, EA ;

Vasalos, IA .

CATALYSIS LETTERS, 2002, 79 (1-4) :137-147

[6] 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

[7] FTIR study of CO interaction with Ru/TiO2 catalysts [J].

Hadjiivanov, K ;

Lavalley, JC ;

Lamotte, J ;

Mauge, F ;

Saint-Just, J ;

Che, M .

JOURNAL OF CATALYSIS, 1998, 176 (02) :415-425

[8] CATALYTIC DECOMPOSITION OF NITROUS-OXIDE ON IN-SITU GENERATED THERMALLY CALCINED HYDROTALCITES [J].

KANNAN, S ;

SWAMY, CS .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1994, 3 (2-3) :109-116

[9]

Kapteijn F, 1996, APPL CATAL B-ENVIRON, V9, P25

[10] Catalytic properties of sprayed Ru/Al2O3 and promoter effects of alkali metals in CO2 hydrogenation [J].

Li, D ;

Ichikuni, N ;

Shimazu, S ;

Uematsu, T .

APPLIED CATALYSIS A-GENERAL, 1998, 172 (02) :351-358

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