So, in a review established by Akah, A. , it is described that rare earth oxides might enhance catalytic features and avoid the loss of acid sites under the fluid catalytic craking (FCC) unit operation, particularly when heavy residue with higher metal content is used as feed. Indeed, this review shows the effects of rare earth materials on the structure, stability, and as well as activity of FCC catalysts. Also, other looks of rare earth metals was taken within this article. Furthermore, in 2019, a review discussed on the use of rare earth elements with transition metal-based materials for ecatalysts design, synthesis, and applications were exhaustively analyzed in Gao's research work . It shows that these rare earth metals could be used for materials engineering for high-tech applications as hydrogen evolution reaction (HER), methanol oxidation reaction (MOR), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). Many benefits and challenges of hybrid materials made via the use of rare earth elements are considered in the study. An alumina (Al2O3) supported nickel catalysts (Ni/Al2O3) modified by rare earth elements was demonstrated as a highly active catalyst for the decomposition of NH3 as described in Okura's paper . Analysis results displays that the Lanthanum (La) modified catalysts reaches the highest ammonia conversion. To boost the catalytic performance of this (La)-modified Ni/Al2O3 catalyst a pretreatment step was required. Hence, 400 °C and 600 °C as calcination, and reduction temperature respectively shows the highest NH3 conversion as high as 94% at 550 °C. Moreover, it is notified from Li's work that lanthanum (La) is the best choice for improving the nickel dispersion and the ratio of metallic to acid functions among rare earth elements. Indeed, due to this fact, high