Preparation an‎d characterization of metal-organic frameworks with nickel an‎d cobalt metals an‎d terephthalic acid ligan‎d an‎d investigation of their application in the water splitting process

12/21/2026 12:00:00 AM

In this study, three metal-organic frameworks of nickel, cobalt, an‎d mixtures of two metals with terephthalic acid an‎d pyrazine ligan‎ds with the formula [Co(μ3-tp)(μ2-pyz)2], [Ni(μ3- tp)(μ2-pyz)2] an‎d [Co/Ni(μ3-tp)(μ2-pyz)2] were synthesized. The three frameworks were characterized by FTIR, XRD, EDAX methods, BET porosimetry, an‎d scanning electron microscopy. Then, their electrochemical properties in water splitting were studied. The water splitting process for hydrogen production an‎d oxygen production was investigated with nickel foam electrocatalyst covered with metal-organic frameworks an‎d according to the results obtained, all three metal-organic frameworks have the best performance in terms of efficiency an‎d it performs the oxygen evolution reaction in the best way an‎d also works well in hydrogen evolution; but the rate of hydrogen release is lower than that of oxygen production, an‎d for hydrogen production, the nickel framework was more responsive than the other two structures. Overall, this study proved that metal-organic frameworks can also have acceptable performance as electrocatalysts for hydrogen an‎d oxygen production, an‎d in some eva‎luation parameters they appeared to be on par with highly efficient electrodes such as platinum. At the current density of 10 mA.cm-2, the over-potentials of 35, 154, an‎d 250 mV were reported in the hydrogen evolution reaction, which are considered very good to average numbers. In the oxygen evolution reaction, the over-potential around 300 mV was also reported, which can be a good performance.

چارچوب فلز-آلي، نيكل، كبالت،ترفتاليكاسيد، پيرازين، شكافت آب

Metal-organic frameworks, Nickel, Cobalt, Terephthalic acid, Pyrazine, Water splitting

HOSSEINMOGHANI

DR.FARANAK MANTEGHI