Effects of Sr/Ti-ratio in SrTiO3-based SOFC anodes investigated by the use of cone-shaped electrodes
(2006) In Electrochimica Acta 52(4). p.1651-1661- Abstract
- In this work the A-site deficiency limit for undoped SrTiO3, calcined in air or reducing atmosphere, was investigated. XRD and SEM analyses showed that when using the solid-state synthesis route it was difficult to achieve any A-site deficiency. Even very small deviations from unity in the Sr/Ti-ratio resulted in impurity phases. The effects of Sr/Ti-ratio on the performance of SrTiO3 anodes for solid oxide fuel cells (SOFCs) was investigated by impedance spectroscopy with cone-shaped electrodes. The electrocatalytic activity of the SrTiO3 cone samples, with various amount of reduced titanium dioxide phases (Magnéli phases), was investigated for oxidation of H2 at 700 °C. High temperature treatment at 1000 °C, between the measurements at... (More)
- In this work the A-site deficiency limit for undoped SrTiO3, calcined in air or reducing atmosphere, was investigated. XRD and SEM analyses showed that when using the solid-state synthesis route it was difficult to achieve any A-site deficiency. Even very small deviations from unity in the Sr/Ti-ratio resulted in impurity phases. The effects of Sr/Ti-ratio on the performance of SrTiO3 anodes for solid oxide fuel cells (SOFCs) was investigated by impedance spectroscopy with cone-shaped electrodes. The electrocatalytic activity of the SrTiO3 cone samples, with various amount of reduced titanium dioxide phases (Magnéli phases), was investigated for oxidation of H2 at 700 °C. High temperature treatment at 1000 °C, between the measurements at 700 °C, showed that high content of Magnéli phases leads to faster degradation of the activity. The suitability for using cone-shaped electrodes as a tool for investigating electrode materials is discussed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/638462
- author
- Blennow Tullmar, Peter LU ; Kammer Hansen, Kent ; Wallenberg, Reine LU and Mogensen, Mogens
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Magnéli phases, Area normalization, A-site deficiency, Cone-shaped electrode, SrTiO3
- in
- Electrochimica Acta
- volume
- 52
- issue
- 4
- pages
- 1651 - 1661
- publisher
- Pergamon Press Ltd.
- external identifiers
-
- wos:000243294300037
- scopus:33751254077
- ISSN
- 0013-4686
- DOI
- 10.1016/j.electacta.2006.03.096
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- 6f1e49ca-47db-463b-bdfc-af236de3980c (old id 638462)
- date added to LUP
- 2016-04-01 11:41:58
- date last changed
- 2022-03-28 01:47:50
@article{6f1e49ca-47db-463b-bdfc-af236de3980c, abstract = {{In this work the A-site deficiency limit for undoped SrTiO3, calcined in air or reducing atmosphere, was investigated. XRD and SEM analyses showed that when using the solid-state synthesis route it was difficult to achieve any A-site deficiency. Even very small deviations from unity in the Sr/Ti-ratio resulted in impurity phases. The effects of Sr/Ti-ratio on the performance of SrTiO3 anodes for solid oxide fuel cells (SOFCs) was investigated by impedance spectroscopy with cone-shaped electrodes. The electrocatalytic activity of the SrTiO3 cone samples, with various amount of reduced titanium dioxide phases (Magnéli phases), was investigated for oxidation of H2 at 700 °C. High temperature treatment at 1000 °C, between the measurements at 700 °C, showed that high content of Magnéli phases leads to faster degradation of the activity. The suitability for using cone-shaped electrodes as a tool for investigating electrode materials is discussed.}}, author = {{Blennow Tullmar, Peter and Kammer Hansen, Kent and Wallenberg, Reine and Mogensen, Mogens}}, issn = {{0013-4686}}, keywords = {{Magnéli phases; Area normalization; A-site deficiency; Cone-shaped electrode; SrTiO3}}, language = {{eng}}, number = {{4}}, pages = {{1651--1661}}, publisher = {{Pergamon Press Ltd.}}, series = {{Electrochimica Acta}}, title = {{Effects of Sr/Ti-ratio in SrTiO3-based SOFC anodes investigated by the use of cone-shaped electrodes}}, url = {{http://dx.doi.org/10.1016/j.electacta.2006.03.096}}, doi = {{10.1016/j.electacta.2006.03.096}}, volume = {{52}}, year = {{2006}}, }