In this work, a series of 10 wt% NiO/CeO₂ catalysts (Ni/Ce) promoted by V₂O₅ with content varying in the range of 0–0.5 wt% was prepared by the co-impregnation method. The characteristics of the catalysts were investigated by several techniques including N₂ physisorption (BET), X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), EDS mapping, carbon dioxide temperature-programmed desorption (CO₂-TPD), and hydrogen temperature-programmed reduction (H₂-TPR). The activity of the catalyst was studied in the micro-flow system in a temperature range of 550 C–800 C, the feedstock composition CH₄/CO₂/H₂O of 3.0/1.2/2.4 and the weight hourly space velocity (WHSV) of 30,000 ml.h⁻¹.g⁻¹. Adding V₂O₅ additive, on the one hand increases the reducibility and basicity of Ni/Ce catalyst, on the other hand reduces oxygen vacancies and increases the crystal size of CeO₂, leading to various effects on catalyst activity depending on its content. Ni/Ce catalyst promoted with 0.3 wt% of V₂O₅ was the best among tested ones, on which at reaction temperature of 700 C, the conversion of CH₄ and CO₂ reached 97% and 77% respectively, and the molar ratio of H₂/CO was 2.1. Meanwhile, on non-promoted Ni/Ce catalyst, the corresponding quantities were 83%, 62% and 1.9, respectively. It is important to note that performance of both was stable for more than 30 h thanks to the better resistance to coke deposition and structural stability.

在这项工作中，通过共浸渍法制备了一系列由V ₂ O ₅促进的10 wt％NiO / CeO ₂催化剂（Ni / Ce），其含量在0-0.5 wt％的范围内变化。通过几种技术研究了催化剂的特性，包括N ₂物理吸附（BET），X射线衍射（XRD），拉曼光谱，透射电子显微镜（TEM），EDS作图，二氧化碳温度程序解吸（CO ₂ -TPD） ）和氢气程序升温还原（H ₂ -TPR）。在550 C–800 C的温度范围内，进料组成为CH ₄ / CO ₂ / H的微流系统中研究了催化剂的活性₂ 3.0 / 1.2 / 2.4 O和30000 ml.h的重时空速（WHSV）^-1 ·G ^-1。添加V ₂ O ₅添加剂，一方面提高了Ni / Ce催化剂的还原性和碱性，另一方面降低了氧空位，增加了CeO ₂的晶体尺寸，从而根据其含量对催化剂活性产生了各种影响。以0.3 wt％的V ₂ O ₅促进的Ni / Ce催化剂是测试催化剂中最好的，在700℃的反应温度下，CH ₄和CO ₂的转化率分别达到97％和77％，摩尔比的H ₂/ CO为2.1。同时，在非助催化剂Ni / Ce催化剂上，相应的量分别为83％，62％和1.9。重要的是要注意到，由于更好的抗焦炭沉积性和结构稳定性，两者的性能都稳定了30小时以上。