Skip to content

Research at St Andrews

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

Research output: Research - peer-reviewArticle

DOI

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
JournalApplied Surface Science
VolumeIn press
Early online date9 Jan 2018
DOIs
StateE-pub ahead of print - 9 Jan 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. Mechanism of enhanced performance on a hybrid direct carbon fuel cell using sawdust biofuels

    Li, S., Jiang, C., Liu, J., Tao, H., Meng, X., Connor, P., Hui, J., Wang, S., Ma, J. & Irvine, J. T. S. 22 Feb 2018 In : Journal of Power Sources. 383, p. 10-16 7 p.

    Research output: Research - peer-reviewArticle

  2. Experimental and modeling study of high performance direct carbon solid oxide fuel cell with in situ catalytic steam-carbon gasification reaction

    Xu, H., Chen, B., Zhang, H., Tan, P., Yang, G., Irvine, J. T. S. & Ni, M. 22 Feb 2018 In : Journal of Power Sources. 382, p. 135-143 9 p.

    Research output: Research - peer-reviewArticle

  3. Scaling up aqueous processing of A-site deficient strontium titanate for SOFC anode supports

    Verbraeken, M. C., Sudireddy, B. R., Vasechko, V., Cassidy, M., Ramos, T., Malzbender, J., Holtappels, P. & Irvine, J. T. S. 29 Nov 2017 In : Journal of the European Ceramic Society. 38, 4, p. 1663-1672

    Research output: Research - peer-reviewArticle

  4. 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. 24 Feb 2017 In : Applied Surface Science. 432, B, p. 272-277

    Research output: Research - peer-reviewArticle

  5. Metal-oxide interactions for infiltrated Ni nanoparticles on A-site deficient LaxSr1 − 3x/2TiO3

    Hui, J., Neagu, D., Miller, D. N., Yue, X., Ni, C. & Irvine, J. T. S. Feb 2018 In : Solid State Ionics. 315, p. 126-130 5 p.

    Research output: Research - peer-reviewArticle

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. 27 Nov 2017 In : Applied Surface Science. 435, p. 1213-1219

    Research output: Research - peer-reviewArticle

  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. 24 Feb 2017 In : Applied Surface Science. 432, B, p. 272-277

    Research output: Research - peer-reviewArticle

  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: Research - peer-reviewArticle

  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: Research - peer-reviewArticle

ID: 252010479