Skip to content

Research at St Andrews

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

Research output: Contribution to journalArticle

Open Access Status

  • Embargoed (until 9/01/19)

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
StatePublished - 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. Framing policy on low emissions vehicles in terms of economic gains: might the most straightforward gain be delivered by supply chain activity to support refuelling?

    Turner, K., Alabi, O., Smith, M., Irvine, J. & Dodds, P. E. Aug 2018 In : Energy Policy. 119, p. 528-534 7 p.

    Research output: Contribution to journalArticle

  2. Probing the structure-property-composition relationship in organic-inorganic tri-halide perovskites

    Payne, J. L., Ni, C., Harwell, J. R., Krishnan Jagadamma, L., McDonald, C., Mariotti, D., Samuel, I. D. W. & Irvine, J. T. S. 16 Jul 2018 In : Physical Chemistry Chemical Physics. In press

    Research output: Contribution to journalArticle

  3. Tailoring SOFC electrode microstructures for improved performance

    Connor, P. A., Yue, X., Savaniu, C. D., Price, R., Triantafyllou, G., Cassidy, M., Kerherve, G., Payne, D. J., Maher, R. C., Cohen, L. F., Tomov, R. I., Glowacki, B. A., Kumar, R. V. & Irvine, J. T. S. 21 Jun 2018 In : Advanced Energy Materials. Early view, 1800120

    Research output: Contribution to journalArticle

  4. Role of lattice distortion and A site cation in the phase transitions of methylammonium lead halide perovskites

    Harwell, J. R., Payne, J. L., Sajjad, M. T., Heutz, F. J. L., Dawson, D. M., Whitfield, P. S., Irvine, J. T. S., Samuel, I. D. W. & Carpenter, M. A. 20 Jun 2018 In : Physical Review Materials. 2, 6, 13 p., 065404

    Research output: Contribution to journalArticle

  5. A novel in situ diffusion strategy to fabricate high performance cathodes for low temperature proton-conducting solid oxide fuel cells

    Hou, J., Miao, L., Hui, J., Bi, L., Liu, W. & Irvine, J. T. S. 14 Jun 2018 In : Journal of Materials Chemistry A. 6, 22, p. 10411-10420 10 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. The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO3(001)

    Suwanwong, S., Eknapakul, T., Rattanachai, Y., Masingboon, C., Rattanasuporn, S., Pattanakun, R., Nakajima, H., King, P., Hodak, S. K. & Meevasana, W. 15 Nov 2015 In : Applied Surface Science. 355, p. 210-212

    Research output: Contribution to journalArticle

ID: 252010479