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.
- low temperature methane conversion
- Co–Ni-based systems
- metal nanoparticles
Kousi, K., Neagu, D., Bekris, L., Calì, E., Kerherve, G., Papaioannou, E. I., Payne, D. J., & Metcalfe, I. S. (2020). Low temperature methane conversion with perovskite-supported exo/endo-particles. Journal of Materials Chemistry. A , 8(25), 12406-12417. https://doi.org/10.1039/D0TA05122E