Issue 25, 2020

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

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.

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

Article information

Article type
Paper
Submitted
19 May 2020
Accepted
09 Jun 2020
First published
11 Jun 2020
This article is Open Access
Creative Commons BY license

J. Mater. Chem. A, 2020,8, 12406-12417

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

K. Kousi, D. Neagu, L. Bekris, E. Calì, G. Kerherve, E. I. Papaioannou, D. J. Payne and I. S. Metcalfe, J. Mater. Chem. A, 2020, 8, 12406 DOI: 10.1039/D0TA05122E

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