Reduction of NO over TiO2-supported Cu catalysts .2. Structure of active Cu species studied by Cu K-Edge XAFS

被引：14

作者：

Aritani, H ^{[1
]}

Tanaka, T ^{[1
]}

Akasaka, N ^{[1
]}

Funabiki, T ^{[1
]}

Yoshida, S ^{[1
]}

Gotoh, H ^{[1
]}

Okamoto, Y ^{[1
]}

机构：

[1] OSAKA UNIV, FAC ENGN SCI, DEPT CHEM ENGN, TOYONAKA, OSAKA 560, JAPAN

来源：

JOURNAL OF CATALYSIS | 1997年 / 168卷 / 02期

关键词：

D O I：

10.1006/jcat.1997.1648

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 active species of Cu supported on TiO2, which were prepared by impregnation method with cupric nitrate and acetate, is investigated by means of Cu K-edge XAFS. The XAFS and UV-VIS spectra showed that the H-2 pretreatment of the samples at 473 K brings about the formation of Cu-0 micro particles with several hundred angstroms of particle size, and the particle on TiO2 prepared from cupric acetate is more stable than that from cupric nitrate. It is concluded that the Cu-0 particle with pertinent size, which coexists with cations such as Cu2+, is the active species for NO reduction. (C) 1997 Academic Press.

引用

页码：412 / 420

页数：9

共 23 条

[1] PREPARATION AND CHARACTERIZATION OF THE CU+/ZSM-5 CATALYST AND ITS REACTION WITH NO UNDER UV IRRADIATION AT 275 K - IN-SITU PHOTOLUMINESCENCE, EPR, AND FT-IR INVESTIGATIONS [J].

ANPO, M ;

MATSUOKA, M ;

SHIOYA, Y ;

YAMASHITA, H ;

GIAMELLO, E ;

MORTERRA, C ;

CHE, M ;

PATTERSON, HH ;

WEBBER, S ;

OUELLETTE, S ;

FOX, MA .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (22) :5744-5750

[2] Reduction of NO over TiO2-supported Cu catalysts [J].

Aritani, H ;

Akasaka, N ;

Tanaka, T ;

Funabiki, T ;

Yoshida, S ;

Gotoh, H ;

Okamoto, Y .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1996, 92 (14) :2625-2630

[3] POTENTIAL REACTION INTERMEDIATES OF NOX REDUCTION WITH PROPANE OVER CU/ZSM-5 [J].

BEUTEL, T ;

ADELMAN, BJ ;

LEI, GD ;

SACHTLER, WMH .

CATALYSIS LETTERS, 1995, 32 (1-2) :83-92

[4] Redox chemistry of Cu/ZSM-5 [J].

Beutel, T ;

Sarkany, J ;

Lei, GD ;

Yan, JY ;

Sachtler, WMH .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (02) :845-851

[5] STUDIES ON ABSORPTION SPECTRA .1. RESULTS OF CALCULATIONS ON THE SPECTRA AND CONFIGURATION OF COPPER(II) IONS [J].

BJERRUM, J ;

BALLHAUSEN, CJ ;

JORGENSEN, CK .

ACTA CHEMICA SCANDINAVICA, 1954, 8 (07) :1275-1289

[6] Adsorption of NO on Cu exchanged zeolites, an FTIR study: Effects of Cu levels, NO pressure, and catalyst pretreatment [J].

Cheung, T ;

Bhargava, SK ;

Hobday, M ;

Foger, K .

JOURNAL OF CATALYSIS, 1996, 158 (01) :301-310

[7]

Crelghton J. A., 1983, J PHYS CHEM, V87, P4793

[8] PREPARATION AND STRUCTURAL CHARACTERIZATION OF AN UNPROTECTED COPPER SOL [J].

CURTIS, AC ;

DUFF, DG ;

EDWARDS, PP ;

JEFFERSON, DA ;

JOHNSON, BFG ;

KIRKLAND, AI ;

WALLACE, AS .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (08) :2270-2275

[9] THE INTERACTION OF NO WITH COPPER IONS IN ZSM5 - AN EPR AND IR INVESTIGATION [J].

GIAMELLO, E ;

MURPHY, D ;

MAGNACCA, G ;

MORTERRA, C ;

SHIOYA, Y ;

NOMURA, T ;

ANPO, M .

JOURNAL OF CATALYSIS, 1992, 136 (02) :510-520

[10] MORPHOLOGY OF SUPPORTED METAL-CLUSTERS - DETERMINATION BY EXAFS AND CHEMISORPTION [J].

GREEGOR, RB ;

LYTLE, FW .

JOURNAL OF CATALYSIS, 1980, 63 (02) :476-486

← 1 2 3 →