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Carbon Formation Pathways and Kinetic Implications in Methane Dry Reforming on Nickel Revealed by Spatio-Temporal Operando Raman Spectroscopy

delete2026-02-10
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R
Riccardo Colombo
M
Matteo Maestri *
DOI:10.1016/j.apcatb.2026.126557delete
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Abstract

Abstract

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• Operando Raman spectroscopy reveals distinct carbon species and their kinetic impacts • Graphitic-C causes early deactivation, while defective-C dictates long-term dynamics • Spatially-resolved spectra link C-distribution to local driving force for diffusion • Deactivation determines apparent deviations from CH4 and CO2 expected reaction orders • Ni and Rh show distinct carbon pathways due to different extents of C-diffusion.
Keywords:
Methane Dry Reforming (MDR)
Ni-based catalysts
Rh-based catalysts
Operando Raman spectroscopy
Spatio-temporal operando analysis
Carbon deposition
Catalyst deactivation
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Applied Catalysis B: Environment and Energy
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