Probing the factors affecting structure and activity of the Au/CeO2 system in total and preferential oxidation of CO

被引：94

作者：

Arena, F

Famulari, P

Trunfio, G

Bonura, G

Frusteri, F

Spadaro, L

机构：

[1] Univ Messina, Dipartimento Chim Ind & Ingn Mat, I-98166 S Agata, Messina, Italy

[2] Ist CNR ITAE Nicola Giordano, I-98126 St Lucia, Messina, Italy

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2006年 / 66卷 / 1-2期

关键词：

Au/CeO2; catalyst; preparation method; reduction pattern; surface area; chlorine; dispersion; total and preferential CO oxidation;

D O I：

10.1016/j.apcatb.2006.02.023

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 effects of the preparation method (deposition-precipitation, co-precipitation, incipient-wetness, combustion) and loading (1-5 wt.%) on the structure and redox features of the Au/CeO2 system have been probed by XRD, TEM and TPR techniques. The catalytic pattern in total (TOX) and preferential (PROX) CO oxidation has been assessed by temperature programmed reaction tests in the range 273-473 K. Controlling surface area and residual chlorine, the synthesis route determines the strength of the Au-CeO2 interaction which, reflecting in a hard reduction of the active phase, hinders the CO oxidation functionality. Chlorine removal by washing treatment in diluted alkaline solutions enables an easy reduction of the active phase, levelling off the TOX and PROX performance of the various systems. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：81 / 91

页数：11

共 31 条

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