Methane conversion over Nb-doped ceria

被引：51

作者：

Ramírez-Cabrera, E

Laosiripojana, N

Atkinson, A

Chadwick, D ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, London SW7 2BY, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England

来源：

CATALYSIS TODAY | 2003年 / 78卷 / 1-4期

关键词：

catalysis; Nb; Ce; SOFC; methane reforming;

D O I：

10.1016/S0920-5861(02)00324-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Methane steam reforming and dry methane conversion over ceria, and ceria doped with 1.4 and 5% Nb cation has been investigated at 900 degreesC (a typical solid oxide fuel cell temperature). The influence of the calcination atmosphere on the Nb-doped ceria has also been studied. Use of reducing conditions leads to significantly lower crystallite size, higher specific surface area and greater Nb solubility. Nb-doping lowers activity mainly as a consequence of strong segregation of Nb to the ceria surface. Kinetics of steam reforming are interpreted in terms of a redox mechanism. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：433 / 438

页数：6

共 20 条

[1] Modelling of an indirect internal reforming solid oxide fuel cell [J].