Abstract:
The increase in world’s energy consumption during the last decades is a result of both the
global rise in population and of the changes in the standard of living. Indicatively, the
average global power demand is predicted to be 30 and 46 TW in 2050 and 2100
respectively. The rapid rising of clean energies in global energy markets requires advanced
and large-scale energy conversion and storage technologies to meet the current power grid
systems. Elemental Hydrogen (H2) is a clean fuel and has tremendous potential for future
sustainable society. therefore, the production of elemental hydrogen by electrochemical
water splitting is a potential route to store pure energy from intermittent energy source such
as solar, or wind but it has been limited by the sluggish kinetics of the anodic reaction,
oxygen evolution reaction which increase the over potential of the cell (OER; 4OH- → O2 +
2H2O + 4e- in alkaline or 2H2O → O2 + 4H+ + 4e- in acid). Although, state of the art
electro-catalyst synthesized of rare elements and their oxide (i.e. Iro2 and Ruo2) show
excellent activity, their scares and high cost has been restricting its industrial application for
many years, Currently, metal organic framework made of cheap and abundant materials
(transition metal complexes) have attracted wide research interest. Herein, we report the
layering technique for synthesizing three Ni-based coordination polymers from Ni
(NO3)2.6H2O and 2-(5-Phenyl-2H-1, 2, 4-triazol-3-yl) pyridine. The compound was
characterized by single crystal x-ray diffraction. 0-D crystal structure was shown in
compound 1 while compound 2 and 3 were both crystallized in 1-D but with different linker
such as and 1,2 bis bipyridine ethane and 4,4 biprydine respectively. The electrochemical
linear sweep voltammetry and impedance spectroscopy depict compound 3 shown high
activity and stability towards oxygen evolution reaction in alkaline solution
