Skip to content

Research at St Andrews

Nanocrystalline CeO2-δ coated β-MnO2 nanorods with enhanced oxygen transfer property

Research output: Contribution to journalArticle

Author(s)

Xiubing Huang, Guixia Zhao, Yueqi Chang, Ge Wang, John T. S. Irvine

School/Research organisations

Abstract

In this research, β-MnO2 nanorods were synthesized by a hydrothermal method, followed by a facile precipitation method to obtain nanocrystalline CeO2-δ coated β-MnO2 nanorods. The as-prepared samples were characterized by XRD, HRTEM, FESEM, XPS and in-situ high-temperature XRD. The HRTEM results show that well dispersed CeO2-δ nanocrystals sized about 5 nm were coated on the surface of β-MnO2 nanorods. The oxygen storage and transfer property of as-synthesized materials were evaluated using TGA under various atmospheres (air, pure N2, and 5%H2/95%Ar). The TGA results indicate that CeO2-δ modification could favour the reduction of Mn4+ to Mn3+ and/or Mn2+ at lower temperature as compared with pure β-MnO2 nanorods and the physically mixed CeO2-δ-β-MnO2 under low oxygen partial pressure conditions (i.e., pure N2, 5%H2/95%Ar). Specifically, CeO2-δ@β-MnO2 sample can exhibit 7.5 wt% weight loss between 100 and 400 °C under flowing N2 and 11.4 wt% weight loss between 100 and 350 °C under flowing 5%H2/95%Ar. During the reduction process under pure N2 or 5%H2/95%Ar condition, the oxygen ions in β-MnO2 nanorods are expected to be released to the surroundings in the form of O2 or H2O with the coated CeO2-δ nanocrystals acting as mediator as inferred from the synergistic effect between the well-interacted CeO2-δ nanocrystals and β-MnO2 nanorods.
Close

Details

Original languageEnglish
Pages (from-to)20-28
JournalApplied Surface Science
Volume440
Early online date9 Jan 2018
DOIs
Publication statusPublished - 15 May 2018

    Research areas

  • CeO2-δ, β-MnO2, Oxygen transfer, Synergetic effect

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. Lattice strain-enhanced exsolution of nanoparticles in thin films

    Han, H., Park, J., Nam, S. Y., Choi, G. M., Parkin, S. S. P., Jang, H. M. & Irvine, J. T. S., 1 Dec 2019, In : Nature Communications. 10, 8 p., 1471.

    Research output: Contribution to journalArticle

  5. Hexagonal perovskite related oxide ion conductor Ba3NbMoO8.5: phase transition, temperature evolution of the local structure and properties

    Chambers, M. S., McCombie, K. S., Auckett, J. E., McLaughlin, A. C., Irvine, J. T. S., Chater, P. A., Evans, J. S. O. & Evans, I. R., 28 Nov 2019, In : Journal of Materials Chemistry. 7, 44, p. 25503-25510 8 p.

    Research output: Contribution to journalArticle

Related by journal

  1. Degradation of the chemotherapy drug 5-fluorouracil on medical-grade silver surfaces

    Risinggård, H. K., Cooil, S., Mazzola, F., Hu, D., Kjærvik, M., Østli, E. R., Patil, N., Preobrajenski, A., Evans, D. A., Breiby, D. W., Trinh, T. T. & Wells, J. W., 30 Mar 2018, In : Applied Surface Science. 435, p. 1213-1219

    Research output: Contribution to journalArticle

  2. Electrochemical properties of composite cathodes using Sm doped layered perovskite for intermediate temperature-operating solid oxide fuel cell

    Baek, S-W., Azad, A. K., Irvine, J. T. S., Choi, W. S., Kang, H. & Kim, J. H., 28 Feb 2018, In : Applied Surface Science. 432, B, p. 272-277

    Research output: Contribution to journalArticle

  3. Electrodeposition of gold templated by patterned thiol monolayers

    She, Z., Di Falco, A., Hähner, G. & Buck, M., 15 Jun 2016, In : Applied Surface Science. 373, p. 51-60

    Research output: Contribution to journalArticle

  4. Evaluation of residual stress in sputtered tantalum thin-film

    Al-Masha'al, A., Bunting, A. & Cheung, R., 15 May 2016, In : Applied Surface Science. 371, p. 571-575 5 p.

    Research output: Contribution to journalArticle

ID: 252010479

Top