Abstract

Nickel-based Ni–Ce_{1 – x}Zr_xO₂ catalysts were prepared by the Pechini method. The catalyst performance in the CO₂ methanation reaction was studied. The catalysts exhibit high catalytic activity comparable to that of the commercial NIAP-07-05 catalyst of methanation. The catalysts were characterized by X‑ray diffraction methods with experiments using synchrotron radiation, and also by high-resolution electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The method for the preparation makes it possible to obtain fine nickel-containing particles formed during the decomposition of the Ni–Ce–Zr–O substitution solid solution obtained during the synthesis. Because of the decorating effect, however, the surface of nickel-containing particles is poorly accessible to reagents. For this reason, the Ni–Ce_{1 – x}Zr_xO₂ catalysts obtained by the Pechini method are less active than supported Ni/Ce_{1 – x}Zr_xO₂ catalysts.

中文翻译：

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Pechini 法制备镍基 Ni–Ce1–xZrxO2 催化剂用于 CO2 甲烷化

摘要

采用Pechini法制备镍基Ni–Ce _{1 – x} Zr _x O _{2催化剂。}催化剂在CO _{2中的性能}研究了甲烷化反应。该催化剂表现出与商业甲烷化NIAP-07-05催化剂相当的高催化活性。通过 X 射线衍射方法和使用同步加速器辐射的实验，以及高分辨率电子显微镜、拉曼光谱和 X 射线光电子能谱对催化剂进行了表征。该制备方法使得可以获得在合成过程中获得的Ni-Ce-Zr-O取代固溶体分解时形成的细小的含镍颗粒。然而，由于装饰作用，含镍颗粒的表面很难接触到试剂。因此，Ni–Ce _{1 – x} Zr _x O ₂通过Pechini方法获得的催化剂的活性低于负载型Ni/Ce _{1 – x} Zr _x O ₂催化剂。