Ni-based Mg/Al double-layered hydroxides, also called hydrotalcites (HTs), were co-precipitated with Zr (5 wt%) and impregnated with Y (0.2, 0.4, 0.6 wt%), and compared to the catalyst co-precipitated with both Y (0.4 wt%) and Zr (5 wt%). Their performance in dry reforming of methane was determined in the temperature range of 850–600 °C and stability tests at 700 °C for 5 h. The materials were characterized by X-ray powder diffraction, X-ray fluorescence, nitrogen adsorption/desorption, H₂-TPR, CO₂-TPD, hydrogen chemisorption, thermogravimetric analysis, transmission electron microscopy, high-resolution transmission electron microscopy, and Raman spectroscopy. A decrease in reducibility and lower total number of basic sites were observed for the sample promoted only with zirconia compared to the unpromoted material. After promotion with yttrium, no formation of ZrO₂–Y₂O₃ solid solution was evident from XRD. The Ni dispersion was decreased due to decoration of the surface with Y species, leading to blockage of available nickel sites. All Zr and Y promoted samples were, however, more active in DRM than unpromoted HTNi. The co-precipitated Zr and Y catalyst (HTNi-ZrY0.4-cop) exhibited increasing conversion over time, and a H₂/CO close to 1 in the isothermal test at 700 °C. H₂-TPSR on the spent catalysts revealed that the promotion with yttrium favored regeneration of the catalytic bed, consuming the majority of removable coke and decreasing the formation of unreactive coke.

镍基Mg / Al双层氢氧化物（也称为水滑石（HTs））与Zr（5 wt％）共沉淀并浸渍Y（0.2、0.4、0.6 wt％），并与催化剂共Y（0.4 wt％）和Zr（5 wt％）沉淀。在850–600°C的温度范围内确定了它们在甲烷干重整中的性能，并在700°C下进行了5小时的稳定性测试。通过X射线粉末衍射，X射线荧光，氮吸附/解吸，H ₂ -TPR，CO ₂表征材料。-TPD，氢化学吸附，热重分析，透射电子显微镜，高分辨率透射电子显微镜和拉曼光谱。与未促进的材料相比，仅用氧化锆促进的样品的还原性降低，碱性位点总数降低。用钇促进后，从X射线衍射未发现ZrO ₂ -Y ₂ O ₃固溶体的形成。由于用Y物种装饰了表面，Ni分散度降低，从而导致可用镍位点的堵塞。但是，所有Zr和Y促进的样品在DRM中的活性均高于未促进的HTNi。共沉淀的Zr和Y催化剂（HTNi-ZrY0.4-cop）随时间的推移表现出增加的转化率，并且H ₂/ CO在700°C等温测试中接近1。废催化剂上的H ₂ -TPSR表明，钇的促进有利于催化床的再生，消耗了大部分可除去的焦炭并减少了未反应焦炭的形成。