In situ/operando combined XAFS/XRD study of Fe-Mo catalysts for continuous CH4 pyrolysis to H2 and carbon nanotubes

This proposal focuses on studying transition metal-supported catalysts for methane pyrolysis into high-purity hydrogen and carbon nanotubes. Methane conversion and carbon product types depend heavily on the catalyst properties, but their precise relationship remains unclear. Fe-based catalysts are seen as robust, eco-friendly, and abundant, while the addition of Mo as a promoter boosts catalyst stability and provides extra carbon nucleation sites. The work aims to use in situ/operando XAFS/XRD to examine the Fe and Mo species formed during methane pyrolysis and subsequent regeneration, and their link to methane activation and selectivity toward carbon nanotubes. The findings will support the design of improved catalysts for continuous hydrogen and carbon nanotube production, which holds significant industrial potential.