Exsolution as a method for catalyst preparation is generally only studied in perovskites or similar systems, which puts a constraint on the catalyst support composition, owing to size and charge balance effects. We show that Ni nanoparticle growth occurs via the exsolution mechanism from a NiO-CeO₂ solid solution with the fluorite structure to form the supported Ni/CeO₂catalyst. This supported catalyst showed high methane dry reforming activity and coke-free performance at 800 °C and using 50 vol% CH₄/50 vol% CO₂ feed gas composition and 5000 Lkg_cat⁻¹ h⁻¹. The use of solid-solution can therefore expand the variety of catalyst supports which could provide coke-free performance under dry reforming reaction conditions.

作为催化剂制备方法的提取通常仅在钙钛矿或类似系统中进行研究，由于尺寸和电荷平衡的影响，这限制了催化剂载体的组成。我们表明，Ni纳米颗粒的生长是通过具有萤石结构的NiO-CeO ₂固溶体的析出机理发生的，从而形成了负载型Ni / CeO ₂催化剂。这种负载的催化剂表现出较高的甲烷重整干燥在800℃下的活性和无焦的性能和使用50体积％的CH ₄ /50体积％的CO ₂进料气体组成和5000 LKG_猫^-1  ħ ^-1。固溶体的使用因此可以扩大催化剂载体的种类，该催化剂载体可以在干重整反应条件下提供无焦炭性能。