Comparative study of CuO-CeO2 catalysts prepared by wet impregnation and deposition-precipitation

被引：73

作者：

Gurbani, A. ^{[1
,3
]}

Ayastuy, J. L. ^{[1
,3
]}

Gonzalez-Marcos, M. P. ^{[1
,3
]}

Herrero, J. E. ^{[2
,3
]}

Guil, J. M. ^{[2
,3
]}

Gutierrez-Ortiz, M. A. ^{[1
,3
]}

机构：

[1] Univ Basque Country, Dept Ingn Quim, Fac Ciencias & Tecnol, E-48080 Bilbao, Spain

[2] CSIC, Inst Quim Fis Rocasolano, E-28006 Madrid, Spain

[3] Univ Politecn Valencia, EHU, CSIC, Unidad Asociada Tecnol Quim Sostenibilidad Ambien, Valencia, Spain

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 01期

关键词：

CuO-CeO2; Deposition-precipitation technique; OSC; Catalytic activity; CO-TPR; CO chemisorption; SELECTIVE CO OXIDATION; FUEL-CELL APPLICATIONS; PREFERENTIAL OXIDATION; CARBON-MONOXIDE; REDOX PROPERTIES; CUO/CEO2; CATALYSTS; EXCESS HYDROGEN; OXIDE CATALYSTS; H-2-RICH GASES; PT/GAMMA-AL2O3;

D O I：

10.1016/j.ijhydene.2008.10.047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Two different preparation methods are used to synthesize wt. 7% CuO-CeO2 catalysts: a conventional wet impregnation method, and a deposition-precipitation (DP) method using Na2CO3 as precipitating agent. Both samples are characterized by a series of techniques. CuO-CeO2 (Cu-Ce) prepared by DP shows a lower capacity to release the lattice oxygen to form CO2. From CO-TPR results, it is demonstrated that this catalyst is not able to reduce copper clusters at low temperatures. Also, CO-TPD shows no CO2 formation. The activity results confirm the worse performance of Cu-Ce prepared by DP especially when oxygen is not in excess (PROX reaction with stoichometric oxygen). A copper particle size which is too small could create a stronger metal-support interaction, with lower Cu-Ce interface to react. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：547 / 553

页数：7

共 28 条

[1]

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