Formation of cereous sulphate phase upon interaction of SO2 with ceria at room temperature -: Thermal analysis, Raman and EPR study

被引：28

作者：

Flouty, R ^{[1
]}

Abi-Aad, E ^{[1
]}

Siffert, S ^{[1
]}

Aboukaïs, A ^{[1
]}

机构：

[1] Univ Littoral Cote Opale, MREID, Lab Catalyse & Environm, F-59140 Dunkerque, France

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 73卷 / 03期

关键词：

CeO2; cereous sulphate formation; EPR; Raman; SO2; adsorption; thermal analysis;

D O I：

10.1023/A:1025818127541

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The adsorption of SO2 gas on ceria solid at room temperature has been investigated by thermal analysis, Raman spectroscopy and electron paramagnetic resonance (EPR). The results confirm that SO2 transformation into sulphate species occurs at 25 degreesC with a concomitant reduction of Ce4+ to Ce3+ ions. The formation of Ce(III)-sulphate phase has been evidenced on ceria surface. The thermal analysis revealed a complete decomposition of cereous sulphate phase to CeO2 at 785 degreesC. The change of oxidation state of Ce(IV) to Ce(III) during the formation of sulphate phase has been confirmed also by EPR technique.

引用

页码：727 / 734

页数：8

共 27 条

[1] TRANSITION-METAL ION DIMERS FORMED IN CEO2 - AN EPR STUDY [J].

ABIAAD, E ;

BENNANI, A ;

BONNELLE, JP ;

ABOUKAIS, A .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (01) :99-104

[2] PREPARATION AND CHARACTERIZATION OF CEO2 UNDER AN OXIDIZING ATMOSPHERE - THERMAL-ANALYSIS, XPS, AND EPR STUDY [J].

ABIAAD, E ;

BECHARA, R ;

GRIMBLOT, J ;

ABOUKAIS, A .

CHEMISTRY OF MATERIALS, 1993, 5 (06) :793-797

[3]

ABIAAD E, 1999, J CHIM PHYS PCB, V96, P1519

[4] HIGHLY RESOLVED ELECTRON-PARAMAGNETIC RESONANCE-SPECTRUM OF COPPER(II) ION-PAIRS IN CUCE OXIDE [J].

ABOUKAIS, A ;

BENNANI, A ;

AISSI, CF ;

WROBEL, G ;

GUELTON, M ;

VEDRINE, JC .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (04) :615-620

[5]

BECK DD, 1991, 910844 SOC AUT ENG I

[6] Surface chemistry of SO2 on Zn and ZnO:: Photoemission and molecular orbital studies [J].

Chaturvedi, S ;

Rodriguez, JA ;

Jirsak, T ;

Hrbek, J .

JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (36) :7033-7043

[7] RAMAN-SPECTRA OF INORGANIC-IONS [J].

DEGEN, IA ;

NEWMAN, GA .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1993, 49 (5-6) :859-887

[8]

DIWELL AF, 1987, 872163 SOC AUT ENG I

[9] Modification of the redox behaviour of CeO2 induced by structural doping with ZrO2 [J].

Fornasiero, P ;

Balducci, G ;

DiMonte, R ;

Kaspar, J ;

Sergo, V ;

Gubitosa, G ;

Ferrero, A ;

Graziani, M .

JOURNAL OF CATALYSIS, 1996, 164 (01) :173-183

[10] ELECTRON-SPIN RESONANCE IN GLASSES .2. MAGNETIC-PROPERTIES [J].

GRISCOM, DL .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1980, 40 (1-3) :211-272

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