Developing silicalite-1 encapsulated Ni nanoparticles as sintering-/coking-resistant catalysts for dry reforming of methane

• Silicalite-1 encapsulated Ni catalyst with improved stability for dry reforming of methane. Different synthesis protocols affect the structure catalysts. Fully prevents sintering and coking. The catalysts in methane (DRM) is a known issue. In this paper an encapsulation strategy has been employed to improve compared conventional impregnation methods. Herein, nickel nanoparticles silicalite-1 were prepared using range methods including post treatment, direct hydrothermal seed-directed investigate effect protocol on properties catalysts, such as degree dispersion, anti-coking/-sintering performance DRM. Ni@SiO 2 -S1 obtained by presented full NPs zeolite framework small particle sizes (∼2.9 nm) strong metal-support interaction, which could sterically hinder migration/aggregation carbon deposition. Therefore, showed stable CO /CH 4 conversions 80% 73%, respectively, negligible metal coking deposition (∼0.5 wt%) over 28 h, outperformed other prepared. contrast, developed post-treatment ethylenediamine-protected co-existence phase internal external surfaces, i.e. incomplete encapsulation, large particles, contributing correlation synthesis-structure-performance study sheds light design coking-/sintering-resistant