Panoscopic alloying of cobalt in CeO2-ZrO2 solid solutions for superior oxygen-storage capacity

Seung Hak Song, Jooho Moon, Jeong Hun Kim, Jongsup Hong, Jong Ho Lee, Hae Weon Lee, Byung Kook Kim, Hyoungchul Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Oxygen processes (reduction and evolution) play a central role in a variety of physical and chemical applications to meet the growing demands for energy and environmental protection. However, the discovery and optimization of such functional materials are great challenges because they are still hampered by material inherencies and thermodynamic limits. Here, we demonstrate the fabrication of a novel material structure via atomistic doping and nanoscale compositing, a panoscopic alloying powder (PAP) of cobalt in a CeO2-ZrO2 solid solution. This novel structure possesses superior oxygen-storage capacity (OSC) and improved structural stability because it retains the best features of both transition-metal oxides and ceria-based ceramics. According to the thermogravimetry and dilatometry measurements of a 10 mol% PAP sample, (Ce0.65Co0.10)Zr0.25O2-δ, at 800 °C under cyclic reduction-oxidation, an OSC of 2312 μmol-O g-1 was successfully obtained with negligible structural change and a linear strain of 1%.

Original languageEnglish
Pages (from-to)206-212
Number of pages7
JournalActa Materialia
Volume113
DOIs
Publication statusPublished - 2016 Jul 1

Bibliographical note

Funding Information:
This work was financially supported by the institutional research program of the KIST ( 2E25321 ).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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