Nickel/cerium–zirconium oxide (Ni/Ce50–Zr50) and manganese promoted Ni/Ce50–Zr50 (Ni–Mn/Ce50-Zr50) catalysts were prepared using an impregnation method and used in the dry reforming of methane. The catalysts were characterized by H₂ temperature-programmed reduction, transmission electron microscopy, X-ray photoelectron spectroscopy, CO₂ temperature-programmed desorption, X-ray diffraction, in situ diffuse reflectance infrared Fourier transform spectra, and thermogravimetric analysis. A manganese promoter facilitated the formation of the reaction intermediate—CH₂OH species at low temperature. A synergistic effect between Ni and Mn species enhanced the adsorption of CO₂ on Ni–Mn/Ce50-Zr50. A manganese promoter not only enhanced the catalytic activity but also led to a high H₂/CO ratio product. At 600 °C, under atmospheric pressure, with 20 000 h^–1 gas hourly space velocity and CH₄/CO₂/Ar = 1:1:8, on a Ni–Mn/Ce50-Zr50 catalyst, the CH₄ conversion (38.7%), CO₂ conversion (40.4%), and the H₂/CO ratio (0.83) were all much higher than those on both nonpromoted Ni/Ce50–Zr50 and SiO₂ supported Ni–Mn catalysts.

中文翻译：

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锰促进的镍/铈-锆锆氧化物催化剂上甲烷干重整制甲烷生产合成气

使用浸渍法制备了镍/铈-锆氧化物（Ni / Ce50-Zr50）和锰促进的Ni / Ce50-Zr50（Ni-Mn / Ce50-Zr50）催化剂，并将其用于甲烷的干重整。通过H _2程序升温还原，透射电子显微镜，X射线光电子能谱，CO _2程序升温解吸，X射线衍射，原位漫反射红外傅里叶变换光谱和热重分析对催化剂进行了表征。锰促进剂在低温下促进了反应中间体-CH ₂ OH物种的形成。Ni和Mn物种之间的协同作用增强了对CO ₂的吸附在Ni-Mn / Ce50-Zr50上。锰助催化剂不仅增强了催化活性，而且导致了高的H ₂ / CO比产物。在Ni-Mn / Ce50-Zr50催化剂上，在大气压下，在600°C，大气压下，以20000 h ^–1气时空速和CH ₄ / CO ₂ / Ar = 1：1：8进行时，CH ₄转化率（ 38.7％），CO ₂转化率（40.4％）和H ₂ / CO比（0.83）均大大高于未助催化的Ni / Ce50-Zr50和SiO ₂负载的Ni-Mn催化剂。