Structure, thermal stability and electrical properties of Ca(V0.5Mo0.5)O3 as solid oxide fuel cell anode

被引：24

作者：

Aguadero, A. ^{[1
]}

de la Calle, C. ^{[2
]}

Alonso, J. A. ^{[2
]}

Perez-Coll, D. ^{[1
]}

Escudero, M. J. ^{[1
]}

Daza, L. ^{[1
,3
]}

机构：

[1] CIEMAT, E-28040 Madrid, Spain

[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain

[3] CSIC, Inst Catalisis & Petroleoquim, E-28049 Madrid, Spain

来源：

JOURNAL OF POWER SOURCES | 2009年 / 192卷 / 01期

关键词：

Electrode; Solid oxide fuel cells; Perovskite; Ca-V-Mo; OXIDATIVE DEHYDROGENATION; CATALYSTS; DIFFRACTION; PEROVSKITES; PROPANE; ALKANES;

D O I：

10.1016/j.jpowsour.2008.12.035

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 Ca(V(0.5)Mo(0.5))O(3) perovskite has been prepared in order to study its potential use as anode in SOFC. The crystal structure has been refined, by neutron powder diffraction, in the orthorhombic Pbnm space group (no. 62). The electrical conductivity values were over 525 S cm(-1) in the studied temperature range (25-800 degrees C). The sample is stable under reducing working conditions (H(2)/N(2) 10:90, 25-900 degrees C). This orthorhombic phase transforms at 500 degrees C in air to the tetragonal I4(1)/a scheelite phase. This transition is reversible and, due to the fact that the thermal expansion coefficients of both, the reduced and oxidized phases, are very similar and match well with those of the other cell components ((10(-13)) x 10(-6) K(-1)) this materials are presented as excellent candidates as anodes in SOFCs. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：78 / 83

页数：6

共 14 条

[1] Structure-activity relationships in alumina-supported molybdena-vanadia catalysts for propane oxidative dehydrogenation [J].