Nanostructured CuxCe1-xO2-y mixed oxide catalysts:: Characterization and WGS activity tests

被引：38

作者：

Pintar, Albin ^{[1
]}

Batista, Jurka ^{[1
]}

Hocevar, Stanko ^{[1
]}

机构：

[1] Natl Inst Chem, Lab Catalysis & Chem React Engn, SI-1001 Ljubljana, Slovenia

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 307卷 / 01期

关键词：

catalytic activity; CuxCe1-xO2-y; heterogeneous catalysis; synthesis; TPR; TPO; TPD; water-gas shift reaction;

D O I：

10.1016/j.jcis.2006.12.005

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：

CuxCe1-xO2-y mixed oxide catalysts were prepared by different preparation procedures: co-precipitation, the sol-gel peroxide route, and the sol-gel citric acid-assisted route, The resulting solids were investigated by means of XRD, BET, H-2 and CO temperature-programmed reduction (TPR), oxidation (TPO) and desorption (TPD) analyses, and N2O pulse selective reaction. it was confirmed that H-2 (CO) consumed for complete reduction of well-dispersed and bulk-like CuO phases to Cu-0, reduction of surface ceria and H-2 (CO) adsorption on the catalyst surface contribute to the total H-2 (CO) consumption. Among catalysts examined, the Cu0.15Ce0.85O2-y mixed oxide sample prepared by means of co-precipitation method exhibits the highest activity and stability for water-gas shift (WGS) pulse reaction in the range of employed operating conditions, WGS activity of copper-ceria mixed oxide catalysts is determined by the extent of surface ceria reduction and dispersion of copper species. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：145 / 157

页数：13

共 30 条

[1]

[Anonymous], POWD DIFFR FIL

[2] Influence of the preparation method on the performance of CuO-CeO2 catalysts for the selective oxidation of CO [J].

Avgouropoulos, G ;

Ioannides, T ;

Matralis, H .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (1-2) :87-93

[3] Selective CO oxidation over CuO-CeO2 catalysts prepared via the urea-nitrate combustion method [J].

Avgouropoulos, G ;

Ioannides, T .

APPLIED CATALYSIS A-GENERAL, 2003, 244 (01) :155-167

[4] CuO-CeO2 mixed oxide catalysts for the selective oxidation of carbon monoxide in excess hydrogen [J].

Avgouropoulos, G ;

Ioannides, T ;

Matralis, HK ;

Batista, J ;

Hocevar, S .

CATALYSIS LETTERS, 2001, 73 (01) :33-40

[5] A comparative study of Pt/γ-Al2O3, Au/α-Fe2O3 and CuO-CeO2 catalysts for the selective oxidation of carbon monoxide in excess hydrogen [J].

Avgouropoulos, G ;

Ioannides, T ;

Papadopoulou, C ;

Batista, J ;

Hocevar, S ;

Matralis, HK .

CATALYSIS TODAY, 2002, 75 (1-4) :157-167

[6] Structural investigation of combustion synthesized Cu/CeO2 catalysts by EXAFS and other physical techniques:: Formation of a Ce1-xCuxO2-δ solid solution [J].

Bera, P ;

Priolkar, KR ;

Sarode, PR ;

Hegde, MS ;

Emura, S ;

Kumashiro, R ;

Lalla, NP .

CHEMISTRY OF MATERIALS, 2002, 14 (08) :3591-3601

[7] INDUCED CHANGES IN CERIA BY THERMAL TREATMENTS UNDER VACUUM OR HYDROGEN [J].

FIERRO, JLG ;

SORIA, J ;

SANZ, J ;

ROJO, JM .

JOURNAL OF SOLID STATE CHEMISTRY, 1987, 66 (01) :154-162

[8]

FLYTZANISTEPHAN.M, 2001, MRS BULL, P885

[9] Wet oxidation of phenol on Ce1-xCuxO2-δ catalyst [J].

Hocevar, S ;

Batista, J ;

Levec, J .

JOURNAL OF CATALYSIS, 1999, 184 (01) :39-48

[10] CWO of phenol on two differently prepared CuO-CeO2 catalysts [J].

Hocevar, S ;

Krasovec, UO ;

Orel, B ;

Aricó, AS ;

Kim, H .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2000, 28 (02) :113-125

← 1 2 3 →