Highly dispersed Ni-based catalysts derived from the LaNiO3 perovskite for dry methane reforming: promotional effect of the Ni0–Ni2+ dipole inlaid on the support

Abstract

Highly dispersed Ni-based catalysts were derived from self-reconstruction of the LaNiO₃ perovskite, which were prepared via the sol–gel process. Activity measurements indicated that the as-prepared catalysts exhibit an excellent dry methane reforming catalytic performance, which can achieve CH₄ conversion of 84.17% and 83.35% at 650 °C at a gas hourly space velocity (GHSV) of 128 L (g_cat h)⁻¹. The physicochemical characterization of the as-prepared catalysts suggested that the transition layer of La₂NiO₄ is formed between metallic Ni⁰ and the La(OH)₃ support. The Ni⁰–Ni²⁺ dipole on the support is relevant to the catalytic activity for the dry methane reforming reaction.