Low temperature methane conversion with perovskite-supported exo/endo-particles

Kalliopi Kousi, Dragos Neagu, Leonidas Bekris, Eleonora Calì, Gwilherm Kerherve, Evangelos I. Papaioannou, David J. Payne, Ian S. Metcalfe

Research output: Contribution to journalArticlepeer-review

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Abstract

Lowering the temperature at which CH4 is converted to useful products has been long-sought in energy conversion applications. Selective conversion to syngas is additionally desirable. Generally, most of the current CH4 activation processes operate at temperatures between 600 and 900 °C when non-noble metal systems are used. These temperatures can be even higher for redox processes where a gas phase–solid reaction must occur. Here we employ the endogenous-exsolution concept to create a perovskite oxide with surface and embedded metal nanoparticles able to activate methane at temperatures as low as 450 °C in a cyclic redox process. We achieve this by using a non-noble, Co–Ni-based system with tailored nano- and micro-structure. The materials designed and prepared in this study demonstrate long-term stability and resistance to deactivation mechanisms while still being selective when applied for chemical looping partial oxidation of methane.
Original languageEnglish
Pages (from-to)12406-12417
Number of pages12
JournalJournal of Materials Chemistry. A
Volume8
Issue number25
Early online date11 Jun 2020
DOIs
Publication statusPublished - 7 Jul 2020

Keywords

  • CH4
  • low temperature methane conversion
  • Co–Ni-based systems
  • metal nanoparticles

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