Application of SR Methods for the Study of Nanocomposite Materials for Hydrogen Energy

V. A. Sadykov, S. N. Pavlova, Z. S. Vinokurov, A. N. Shmakov, N. F. Eremeev, Yu E. Fedorova, E. P. Yakimchuk, V. V. Kriventsov, V. A. Bolotov, Yu Yu Tanashev, E. M. Sadovskaya, S. V. Cherepanova, K. V. Zolotarev

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

This work summarizes results of synchrotron radiation (SR) studies of the real/defect structure of nanocrystalline/nanocomposite oxide materials, which determines their functional properties in hydrogen energy field as catalysts and mixed ionic electronic conductors (cathodes and anodes of solid oxide fuel cells, oxygen separation membranes). For nanocrystalline ceria-zirconia mixed oxide prepared via modified Pechini route using ethanol solution of reagents, a high spatial uniformity of cations distribution between domains along with the oxygen sublattice deficiency revealed by full-profile Rietveld refinement of SR diffraction data provide structure disordering enhancing oxygen mobility. For PrNi0.5Co0.5O3-δ - Ce0.9Y0.1O2-δ nanocomposite extensive transfer of Pr cations into fluorite domains generates a new path of fast oxygen diffusion along chains of Pr3+ - Pr4+ cations as directly proved by analysis of the unit cell relaxation after changing pO2 in perfect agreement with data obtained by oxygen isotope heteroexchange.

Original languageEnglish
Pages (from-to)397-406
Number of pages10
JournalPhysics Procedia
Volume84
DOIs
Publication statusPublished - 2016
EventInternational Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2016 - Novosibirsk, Russian Federation
Duration: 4 Jul 20167 Jul 2016

Keywords

  • catalytic membrane reactors
  • oxygen mobility
  • perovskite-fluorite nanocomposites
  • SOFC
  • synchrotron radiaton
  • unit cell volume relaxation
  • XAFS

Fingerprint Dive into the research topics of 'Application of SR Methods for the Study of Nanocomposite Materials for Hydrogen Energy'. Together they form a unique fingerprint.

Cite this