Sun, H et al's paper . Indeed, it was found that the designed composite (Ni/rGO) exhibits ultrahigh catalytic activity, excellent stability over 1000 cycles, and as well as 4.0 M methanol as a saturation concentration of the methanol oxidation reactions. It is noticed that the obtained results are better than all previously reported Nibased catalysts for methanol oxidation reactions (MOR) and even better than the state-of-the-art (Pt/C) catalyst. It also presented high methanol tolerance with (6.0 M) as a methanol saturation concentration for catalytic oxidation of methanol under mild conditions. Hence, as electrochemically described in Fig. , the proposed catalyst (Ni/rGO) demonstrated superior catalytic performances for MOR than the commercial Pt/C catalyst. This superiority might result from the contribution of the synergistic effect coming from all sides of both pure Ni and reduced graphene oxides to make this fully active catalyst (Ni/rGO). Also, it is described by Halim, E.M et al that Ni NPs anchored over poly (para-phenylenediamine) (PpPD) and carbon nanofibers (CNFs) catalyst (Ni NPs/PpPD/CNFs/CPE) possesses higher catalytic activity for methanol oxidation reaction (MOR) under alkaline nature. So, it is noticed that the contribution of synergistic effect due to the incorporation of carbon nanofibers (CNFs) and PpPD develops the electron transfer of the final catalyst. Therefore, (Ni NPs/PpPD/CNFs/CPE) exhibited enriched performance for MOR with an interesting current density (Ip = 38.11 mA/cm 2 ) and superior durability up to 6 hours when compared to the electrode engineered without PpPD (Ni NPs/CNFs/CPE). Recently, a regeneration of Ni NPs embedded over polypyrrole (Ni NPs-R/PPy) has been adopted as a novel strategy toward catalyst design for energy conversion and storage, especially for ethanol oxidation reaction under alkaline electrolyte as notified in Chemchoub, S et al's research paper . Indeed, as carefully demonstrated by analytical methods, both regeneration of Ni NPs and PPy incorporation effects lead to boost perfectly the electrochemical properties of the elaborated catalyst. Hence, Ni NPs-R/PPy/CPE revealed advanced catalytic activity (Ip = 20 mA/cm 2 ) towards the ethanol oxidation reaction (EOR) with higher durability up to 1 h 25 mn and as well as a superior catalyst resistant to poisoning species. So, as fully proved by these research papers and many others, Ni-based materials have enhanced properties for several catalytic oxidation reactions including oxygen evolution, alcohol oxidation, hydrogen oxidation reactions, and so forth. These Ni-based catalysts can be useful in both at laboratory and as well as in an industrial scale. Therefore, the next section will be dedicated to the recent research advances in Ni-based materials for hydrolysis reactions.