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NiAl2O4-derived active sites over Ni/Al2O3 catalysts for dry reforming of methane: Temperature-dependent interplay between support morphology and thermodynamic driving forces
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DOI：10.1016/j.jcou.2026.103431.png)
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Abstract
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• Macroporous and non-macroporous Ni-based catalysts were synthesized at various calcination temperatures. • The 600 °C calcination demonstrated a geometric effect on the formation of NiAl2O4 in macroporous supports. • The 800 °C calcination was sufficiently high to overcome the geometric barrier of the NiAl2O4 formation. • Catalysts calcined at 800 °C demonstrated improved stability and a superior carbon balance. • Ni–oxygen vacancy interfaces effectively suppressed coke formation during the dry reforming of methane.
Keywords:
NiAl2O4 formation
Active sites
Dry reforming
Geometric effect
Coke resistance
Ni-Ov interfaces
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