Rayhan Mohammad Abdo  <br/><br/>
Preparation of low hydrogen over voltage surface protected nano-structure cathode /  
 تحضير قطب كاثودي منخفض فوق جهد الهيدروجين محمي السطح ذو التركيب متناهي الصغر 
Rayhan Mohammad Abdo ; Supervised Ahmed Galal Helmy , Emanbellah Sayed Mettawee  
 - Cairo :   Rayhan Mohammad Abdo  ,   2014 
 - 136 P. :   charts , facsimiles ;   25cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Physical Chemistry 
<br/><br/> Due to the shortage and the environmental problems of fossil fuel, a future perspective use  of solar energy is its combination with water and its consequent electrolysis for generation of  hydrogen gas, which is another form of clean energy sources. One of the main problems facing  the production of hydrogen via water electrolysis is the cathodic material. Thus, development of  economic, but active cathode materials is important in order to make the electrolysis process  more effective.  The modification of the electrodeposited Ni-Fe alloys was carried out via the addition of  zinc and its subsequent leaching in an alkaline solution. The electrocatalytic performances of the modified alloys for hydrogen evolution in alkaline media had been investigated by cyclic  voltammetry and Tafel linear polarization. The optimal conditions for the preparation of a  modified NiFe cathode are listed as pH 5, temperature 25C and electroplating current density 45 mA.cm⁻² 
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<br/><br/><label>Subjects--Index Terms: </label>Cyclic voltammetry Nano alloy Tafel linear polarization