Nickel exsolution-driven phase transformation from an n=2 to an n=1 ruddlesden-popper manganite for methane steam reforming reaction in sofc conditions - Université de Lille
Article Dans Une Revue ChemCatChem Année : 2019

Nickel exsolution-driven phase transformation from an n=2 to an n=1 ruddlesden-popper manganite for methane steam reforming reaction in sofc conditions

Résumé

An original way to perform the exsolution of Ni nanoparticles on a ceramic support was explored for the development of methane steam reforming catalyst in SOFC anode conditions. The n=2 Ruddlesden-Popper (RP) phase La1.5Sr1.5Mn1.5Ni0.5O7±δ has been synthesized by the Pechini method and subsequently reduced with an H2-N2 mixture at different temperatures and reducing times to induce the formation of two phases: LaSrMnO4 (n=1 RP) decorated with metallic Ni nanoparticles. Preliminary measurements of catalytic behavior for the steam reforming have been carried out in a reduction-reaction process with a mixture of 82 mol %CH4, 18 mol %N2 and low steam to carbon ratio (S/C=0.15). The catalyst exhibits a selectivity for CO production (0.97), 14.60 mol % CH4 conversion and around 24.19 mol % H2 production. Such catalytic behavior was maintained for more than 4 h, with a constant rate of hydrogen production and CH4 conversion rate.
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Dates et versions

hal-03976773 , version 1 (18-12-2023)

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Sebastian Vecino-Mantilla, Paola Gauthier-Maradei, Marielle Huvé, Manuel Jose Serra, Pascal Roussel, et al.. Nickel exsolution-driven phase transformation from an n=2 to an n=1 ruddlesden-popper manganite for methane steam reforming reaction in sofc conditions. ChemCatChem, 2019, ChemCatChem, ⟨10.1002/cctc.201901002⟩. ⟨hal-03976773⟩
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