Abstract

Parastoo Dezvareh¹, Moayad Hossaini Sadr²*, Hamidreza Aghabozorg³ and Karim Zare⁴

DOI : http://dx.doi.org/10.13005/ojc/320526

The La_1-xCe_xNi_0.4Fe_0.6O₃ (x= 0.1, 0.2 and 0.3) perovskite nanostructures were prepared via citrate sol-gel method. Synthesized samples were characterized by X-ray diffraction (XRD), temperature programmed reduction (TPR), and inductively coupled plasma (ICP) techniques. Specific surface area was determined by BET measurement. Scanning and transmission electron microscopy techniques were applied to study the morphology of the prepared samples. XRD patterns confirmed that a well-crystallized perovskite structure was formed in doping level up to x=0.2. Morphology results showed that homogenous particles in the range of nanometers were obtained through the applied synthesis method. TPR analysis revealed that by increasing the doping level of Ce up to 0.2 inthe preparedsamples, reduction process shifted to lower temperatures.The addition of Ce to La_1-xCe_xNi_0.4Fe_0.6O₃enhances the catalytic activity up to x= 0.2,but decreased significantly when x> 0.2. Catalytic activityof La_1-xCe_xNi_0.4Fe_0.6O₃perovskites in dry reforming of methane (DRM) were: LaNiO₃>La_0.8Ce_0.2Ni_0.4Fe_0.6O₃>La_0.9Ce_0.1Ni_0.4Fe_0.6O₃> LaNi_0.4Fe_0.6O₃>La_0.7Ce_0.3Ni_0.4Fe_0.6O₃

Ce-substitution; perovskite; nanocatalyst; citrate sol-gel method; dry reforming of methane (DRM)

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