TPD study in LSM/YSZ/LaAlO system for the use of fuel cell type reactor

被引：9

作者：

Kiatkittipong, W

Tagawa, T ^{[1
]}

Goto, S

Assabumrungrat, S

Praserthdam, P

机构：

[1] Nagoya Univ, Dept Chem Engn, Nagoya, Aichi 4648603, Japan

[2] Chulalongkorn Univ, Ctr Excellence Catalysis & Catalyt React Engn, Dept Chem Engn, Bangkok 10330, Thailand

来源：

SOLID STATE IONICS | 2004年 / 166卷 / 1-2期

关键词：

solid oxide fuel cell; oxygen permeation; temperature-programmed desorption; NEMCA;

D O I：

10.1016/j.ssi.2003.10.018

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：

Behaviors of oxygen species in the LSM/YSZ/LaAlO SOFC type reactor were investigated. The fuel cell type temperature-programmed desorption (FC-TPD) measurements were employed in three operating modes; i.e. (1) open circuit, (2) closed circuit without applied potential and (3) closed circuit with applied potential modes. Various pretreatment conditions, i.e. (a) open circuit, (b) closed circuit without applied potential and (c) closed circuit with applied potential, were investigated. The FC-TPD technique enables to discuss the oxygen species responsible for a combustion reaction and those for a coupling reaction, separately. The open circuit type FC-TPD showed that the applied potential during the pretreatment caused the increase in the amount of surface oxygen and the decrease in activation energy of desorption of oxygen at the anode catalyst. The closed circuit FC-TPD provided the combined effects of desorption and permeation. In addition, the FC-TPD analysis could correlate the behavior of adsorbed oxygen species to the NEMCA effect observed in the oxidative coupling of methane in the SOFC reactor. (C) 2003 Elsevier B.V All rights reserved.

引用

页码：127 / 136

页数：10

共 23 条

[1] USE OF A NOVEL TEMPERATURE-PROGRAMMABLE ELECTROCHEMICAL-CELL TO INVESTIGATE ELECTROCHEMICALLY GENERATED SURFACE OXYGEN SPECIES [J].