This work deals with the catalytic performance of nickel‐cobalt supported on ceria‐doped gadolinia (GDC) catalyst in the single and in the simultaneous methanation of carbon monoxide and carbon dioxide. The catalysts have been prepared by impregnation method, starting from metal salts precursors. Samples have been characterized by x‐ray diffraction (XRD), thermogravimetric analysis and differential scanning calorimetry (TGA‐DSC), hydrogen temperature programmed reduction (TPR‐H₂), transmission electronic microscopy (TEM), and scanning electron microscopy (SEM/EDX) technique. The temperature examined for methanation tests ranged from 200°C‐600°C. The results show that the prepared and optimized catalysts possess the main characteristics of materials suitable for SOECs (solid oxide electrolyzer cells) applications: high metal content (50% wt/wt with respect to the support), high activity, and high stability. The catalytic performance of bimetallic catalysts highlights that the cobalt does not improve the activity of the nickel catalysts.

中文翻译：

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Ni-Co负载金属在二氧化碳甲烷化中的催化活性

这项工作处理的是一氧化碳掺杂的氧化and（GDC）催化剂上负载的镍钴在一氧化碳和二氧化碳的同时甲烷化中的催化性能。催化剂是通过浸渍方法从金属盐前体开始制备的。样品的特征在于X射线衍射（XRD），热重分析和差示扫描量热法（TGA-DSC），氢气程序升温还原（TPR-H ₂），透射电子显微镜（TEM）和扫描电子显微镜（SEM / EDX）技术。甲烷化测试的温度范围为200°C-600°C。结果表明，所制备和优化的催化剂具有适用于SOEC（固体氧化物电解槽）应用的材料的主要特征：高金属含量（相对于载体为50％wt / wt），高活性和高稳定性。双金属催化剂的催化性能突出表明钴不能改善镍催化剂的活性。