Low temperature methane conversion with perovskite-supported exo/endo-particles. Issue 25 (19th June 2020)

• Record Type: Journal Article
• Authors: Kousi, Kalliopi; Neagu, Dragos; Bekris, Leonidas; Calì, Eleonora; Kerherve, Gwilherm; Papaioannou, Evangelos I.; Payne, David J.; Metcalfe, Ian S.
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 25(2020)
• Page Start: 12406
• Page End: 12417
• Publication Date: 2020-06-19
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta05122e
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Lowering methane conversion temperature has been long-sought in energy conversion applications and is now being realised via exo/endo-particle perovskites. 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.