Flower-like perovskite LaCr0.9Ni0.1O3−δ–NiO nanostructures: a new candidate for CO2 reforming of methane

Abstract

We have developed a facile low-cost approach to the fabrication of large-scale flower-like perovskite-type oxides: orthorhombic LaCr_0.9Ni_0.1O_3−δ nanowires. The nanowires (∼76.2%) exhibited higher CO₂ conversion than their conventional bulk counterpart (∼40.1%) due to exposure of more active sites. The unique morphological structure of the nanowires enhanced the dispersion of Pd nanoparticles on its edges and surfaces, resulting in excellent performance and stability in CO₂ reforming of methane. The Pd decorated LaCr_0.9Ni_0.1O_3−δ nanowires exhibit optimum CO₂ and CH₄ conversions of ∼98.6% and ∼75.4% at 800 °C. The high turnover frequency (TOF) of CH₄ (6.04 s⁻¹) on 1 wt% Pd decorated LaCr_0.9Ni_0.1O_3−δ might be attributed to high dispersion of Pd species on the nanowires.