Skip to content

Research at St Andrews

Disruption of extended defects in solid oxide fuel cell anodes for methane oxidation

Research output: Contribution to journalArticle

DOI

Author(s)

Juan Carlos Ruiz-Morales, Jesus Canales Vazquez, Cristian Daniel Savaniu, D Marrero-Lopez, Wuzong Zhou, John Thomas Sirr Irvine

School/Research organisations

Abstract

Point defects largely govern the electrochemical properties of oxides: at low defect concentrations, conductivity increases with concentration; however, at higher concentrations, defect - defect interactions start to dominate(1,2). Thus, in searching for electrochemically active materials for fuel cell anodes, high defect concentration is generally avoided. Here we describe an oxide anode formed from lanthanum-substituted strontium titanate (La-SrTiO3) in which we control the oxygen stoichiometry in order to break down the extended defect intergrowth regions and create phases with considerable disordered oxygen defects. We substitute Ti in these phases with Ga and Mn to induce redox activity and allow more flexible coordination. The material demonstrates impressive fuel cell performance using wet hydrogen at 950 degrees C. It is also important for fuel cell technology to achieve efficient electrode operation with different hydrocarbon fuels(3,4), although such fuels are more demanding than pure hydrogen. The best anode materials to date-Ni-YSZ ( yttria-stabilized zirconia) cermets(5) - suffer some disadvantages related to low tolerance to sulphur(6), carbon build-up when using hydrocarbon fuels(7) ( though device modifications and lower temperature operation can avoid this(8,9)) and volume instability on redox cycling. Our anode material is very active for methane oxidation at high temperatures, with open circuit voltages in excess of 1.2 V. The materials design concept that we use here could lead to devices that enable more-efficient energy extraction from fossil fuels and carbon-neutral fuels.

Close

Details

Original languageEnglish
Pages (from-to)568-571
Number of pages4
JournalNature
Volume439
Issue number7076
DOIs
Publication statusPublished - 2 Feb 2006

    Research areas

  • SOFC ANODES, TEMPERATURE, HYDROCARBONS, OPERATION, GAS

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

View graph of relations

Related by author

  1. An FeNbO4-based oxide anode for a solid oxide fuel cell (SOFC)

    Liu, X., Xie, D., Irvine, J. T. S., Ni, J. & Ni, C., 11 Jan 2020, In : Electrochimica Acta. In press, 135692.

    Research output: Contribution to journalArticle

  2. Oxygen redox activity through a reductive coupling mechanism in the P3-type nickel-doped sodium manganese oxide

    Kim, E. J., Ma, L. A., Duda, L. C., Pickup, D. M., Chadwick, A. V., Younesi, R., Irvine, J. T. S. & Armstrong, R., 6 Jan 2020, In : ACS Applied Energy Materials. Early View

    Research output: Contribution to journalArticle

  3. A B-site doped perovskite ferrate for efficient anode of a solid oxide fuel cell with in situ metal exsolution

    Ni, C., Zeng, Q., He, D., Peng, L., Xie, D., Irvine, J. T. S., Duan, S. & Ni, J., 21 Dec 2019, In : Journal of Materials Chemistry A. 7, 47, p. 26944-26953 10 p.

    Research output: Contribution to journalArticle

  4. Effect of oxygen coordination environment of Ca-Mn oxides on catalytic performance of Pd supported catalysts for aerobic oxidation of 5-hydroxymethyl-2-furfural

    Yang, J., Yu, H., Wang, Y., Qi, F., Liu, H., Lou, L-L., Yu, K., Zhou, W. & Liu, S., 7 Dec 2019, In : Catalysis Science & Technology. 9, 23, p. 6659-6668

    Research output: Contribution to journalArticle

  5. Asymmetric oxygen vacancies: the intrinsic redox active sites in metal oxide catalysts

    Yu, K., Lou, L-L., Liu, S. & Zhou, W., 5 Dec 2019, In : Advanced Science . Early View, 8 p., 1901970.

    Research output: Contribution to journalArticle

Related by journal

  1. An anti-CRISPR viral ring nuclease subverts type III CRISPR immunity

    Athukoralage, J. S., McMahon, S., Zhang, C., Gruschow, S., Graham, S., Krupovic, M., Whitaker, R., Gloster, T. & White, M., 23 Jan 2020, In : Nature. 577, 7791, p. 572-575 4 p.

    Research output: Contribution to journalArticle

  2. Importance and vulnerability of the world’s water towers

    Immerzeel, W. W., Lutz, A. F., Andrade, M., Bahl, A., Biemans, H., Bolch, T., Brumby, S., Davies, B. J., Hyde, S., Elmore, A. C., Emmer, A., Feng, M., Fernández, A., Haritashya, U., Kargel, J. S., Koppes, M., Kraaijenbrink, P. D. A., Kulkarni, A. V., Mayewski, P., Nepal, S. & 12 others, Pacheco, P., Painter, T. H., Pellicciotti, F., Rajaram, H., Rupper, S., Sinisalo, A., Shrestha, A. B., Viviroli, D., Wada, Y., Xiao, C., Yao, T. & Baillie, J. E. M., 16 Jan 2020, In : Nature. 577, 7790, p. 364-369

    Research output: Contribution to journalArticle

  3. Constraints on the superconducting order parameter in Sr2RuO4 from oxygen-17 nuclear magnetic resonance

    Pustogow, A., Luo, Y., Chronister, A., Su, Y. -S., Sokolov, D., Jerzembeck, F., Mackenzie, A. P., Hicks, C. W., Kikugawa, N., Raghu, S., Bauer, E. & Brown, S., 3 Oct 2019, In : Nature. 574, 7776, p. 72–75 11 p.

    Research output: Contribution to journalArticle

  4. Pluripotency and the origin of animal multicellularity

    Sogabe, S., Hatleberg, W. L., Kocot, K. M., Say, T. E., Stoupin, D., Roper, K., Fernandez-Valverde, S. L., Degnan, S. M. & Degnan, B. M., 12 Jun 2019, In : Nature. 20 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Nature (Journal)

    Will Cresswell (Reviewer)
    21 Dec 2017

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  2. Nature (Journal)

    Will Cresswell (Reviewer)
    11 Nov 2017

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  3. Nature (Journal)

    David Gerard Dritschel (Editor)
    2005 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

  4. Nature (Journal)

    Ifor David William Samuel (Editor)
    2005 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

ID: 379899

Top