This paper describes a facile method to produce mesoporous nanostructure Ni/Al₂O₃, Ni/MgO, and Ni/xMgO.Al₂O₃ (x: MgO/Al₂O₃ molar ratio) catalysts prepared by “one-pot” evaporation-induced self-assembly (EISA) method with some modifications for investigating in the thermocatalytic decomposition of methane. Detailed characterizations of the material were performed with X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) and N₂ adsorption/desorption, hydrogen temperature-programmed reduction (H₂-TPR), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and temperature-programmed oxidation (TPO). The characterizations demonstrated that the synthesized catalysts with various MgO/Al₂O₃ molar ratios possessed mesoporous structure with the high BET area in the range of 216.79 to 31.74 m² g⁻¹. The effect of different surfactants and calcination temperatures on the characterizations and catalytic activity of the catalysts were also examined in details. The experimental results showed that the catalysts exhibited high catalytic potential in this process and the 55 wt.% Ni/2 MgO·Al₂O₃ catalyst calcined at 600^οC possessed an acceptable methane conversion (∼60%) under the harsh reaction conditions (GHSV = 48000 (mL h⁻¹ g_cat⁻¹)).

本文描述了一种简便的方法来制备介孔纳米结构的Ni / Al ₂ O ₃，Ni / MgO和Ni / xMgO.Al ₂ O ₃（x：MgO / Al ₂ O ₃摩尔比）催化剂，通过“一锅法”制备蒸发诱导自组装（EISA）方法，对甲烷进行热催化分解进行了一些修改。通过X射线衍射（XRD），Brunauer-Emmett-Teller（BET）和N ₂吸附/解吸，氢程序升温还原（H ₂-TPR），扫描电子显微镜（SEM），高分辨率透射电子显微镜（HRTEM）和程序升温氧化（TPO）。表征表明，合成的MgO / Al ₂ O ₃摩尔比不同的催化剂具有介孔结构，高BET面积在216.79〜31.74 m ²  g ^-1之间。还详细研究了不同的表面活性剂和煅烧温度对催化剂的表征和催化活性的影响。实验结果表明，该催化剂在该过程中具有较高的催化潜能，并且55 wt。％的Ni / 2 MgO·Al ₂ O ₃催化剂在600 ^oC下煅烧。在苛刻的反应条件下（GHSV = 48000（mL h ^-1  g _cat ^-1）），C具有可接受的甲烷转化率（约60％）。