Skip to content

Research at St Andrews

Sc-substituted oxygen excess titanates as fuel electrodes for SOFC

Research output: Contribution to journalArticlepeer-review

DOI

Author(s)

Jesus Canales Vazquez, Juan Carlos Ruiz-Morales, John Thomas Sirr Irvine, Wuzong Zhou

School/Research organisations

Abstract

A new family of perovskite-based materials La2Sr4Ti6-xScxO19-z has been investigated in the search of alternative anodes for solid oxide fuel cells (SOFCs). Although these phases show a pseudocubic unit cell (a approximate to 3.91 angstrom) by X-ray diffraction, the structure is far more complex with extra oxygen beyond the ABO(3) perovskite stoichiometry accommodated in local defects randomly distributed within a perovskite framework. The presence of Sc has a negative effect on the electronic conductivity, which gradually decreases with increasing x, although the oxidation and reduction kinetics is improved. The fuel cell performance, however, is improved in comparison to reported results for the nonsubstituted phases at low levels of substitution. Anodic polarization overpotentials of 0.25 and 0.30 V at 500 mA cm(-2) at 900 degrees C under wet H-2 and CH4, respectively, were obtained for the x=0.3 composition. The relatively low overpotential, especially under methane, indicates this to be a promising approach toward anode development. (c) 2005 The Electrochemical Society. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)A1458-1465
Number of pages8
JournalJournal of Electrochemical Society
Volume152
DOIs
Publication statusPublished - 2005

    Research areas

  • STRUCTURAL CHEMISTRY, LESS-THAN, CONDUCTIVITY, PEROVSKITE

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. 2021 roadmap for sodium-ion batteries

    Tapia-Ruiz, N., Armstrong, A. R., Alptekin, H., Amores, M. A., Au, H., Barker, J., Boston, R., Brant, W. R., Brittain, J. M., Chen, Y., Chhowalla, M., Choi, Y-S., Costa, S. I. R., Crespo Ribadeneyra, M., Cussen, S. A., Cussen, E. J., David, W. I. F., Desai, A. V., Dickson, S. A. M., Eweka, E. I. & 41 others, Forero-Saboya, J. D., Grey, C. P., Griffin, J. M., Gross, P., Hua, X., Irvine, J. T. S., Johansson, P., Jones, M. O., Karlsmo, M., Kendrick, E., Kim, E., Kolosov, O. V., Li, Z., Mertens, S. F. L., Mogensen, R., Monconduit, L., Morris, R. E., Naylor, A. J., Nikman, S., O’keefe, C. A., Ould, D. M. C., Palgrave, R. G., Poizot, P., Ponrouch, A., Renault, S., Reynolds, E. M., Rudola, A., Sayers, R., Scanlon, D. O., Sen, S., Seymour, V. R., Silván, B., Sougrati, M. T., Stievano, L., Stone, G. S., Thomas, C. I., Titirici, M-M., Tong, J., Wood, T. J., Wright, D. S. & Younesi, R., 26 Jul 2021, In: Journal of Physics: Energy. 3, 3, 89 p., 031503.

    Research output: Contribution to journalArticlepeer-review

  2. Roadmap on inorganic perovskites for energy applications

    Irvine, J., Rupp, J., Liu, G., Xu, X., Haile, S. M., Qian, X., Snyder, A., Freer, R., Ekren, D., Skinner, S., Celikbilek, O., Chen, S., Tao, S., Shin, T. H., O'Hayre, R., Huang, J., Duan, C., Papac, M., Li, S., Russel, A. & 8 others, Celorrio, V., Hayden, B., Nolan, H., Huang, X., Wang, G., Metcalfe, I., Neagu, D. & Martin, S. G., 22 Jul 2021, In: Journal of Physics: Energy. 3, 3, 51 p., 031502.

    Research output: Contribution to journalReview articlepeer-review

  3. Formation and near-infrared emission of CsPbI3 nanoparticles embedded in Cs4PbI6 crystals

    Bao, Z., Hsiu, C-Y., Fang, M-H., Majewska, N., Sun, W., Huang, S-J., Yuan, E. C-Y., Chang, Y-C., Chan, J. C. C., Mahlik, S., Zhou, W., Yang, C-W., Lu, K-M. & Liu, R-S., 15 Jul 2021, (E-pub ahead of print) In: ACS Applied Materials & Interfaces. 13, 29, p. 34742-34751

    Research output: Contribution to journalArticlepeer-review

  4. Carrier extraction from metallic perovskite oxide nanoparticles

    McDonald, C., Ni, C., Švrček, V., Macias-Montero, M., Velusamy, T., Connor, P. A., Maguire, P., Irvine, J. T. S. & Mariotti, D., 9 Jul 2021, (E-pub ahead of print) In: Nanoscale. Advance Article, 8 p.

    Research output: Contribution to journalArticlepeer-review

  5. Time-resolved in-situ X-ray diffraction study of CaO and CaO:Ca3Al2O6 composite catalysts for biodiesel production

    Bonaccorso, A. D., Papargyriou, D., Fuente Cuesta, A., Magdysyuk, O. V., Michalik, S., Connolley, T., Payne, J. L. & Irvine, J. T. S., 28 Jun 2021, In: Journal of Physics: Energy. 3, 3, 12 p., 034014.

    Research output: Contribution to journalArticlepeer-review

ID: 380277

Top