<![CDATA[Water is abundant on Earth, so its utilization as an energy source makes its own challenges. Water molecules can be reacted into hydrogen and oxygen gasses in various ways. Hydrogen gas is an environmentally friendly fuel, reliable substitution for fossil fuel which is depleting within time, so the efforts relating to the provision of renewable energy needs support from various parties. Electrolysis is a well known process, which is one of the ways to react the water molecule into hydrogen and oxygen gas, but it has low effectiveness generally. Therefore, it is necessary to have the efforts increasing the effectiveness of electrolysis process, both in terms of electrodes and the electrolyte used. This study had conducted on base condition with NaHCO3 addition, on dahlia tuber starch media, and using working electrode stainless steel and stainless steel/Fe-Co-Ni. The method of research was using linear and cyclic voltammetry using eDAQEChem voltammeter apparatus, which is able to describe the flow of voltage and current used within electrolysis process. The existence of dahlia tuber starch leads to cover the surface of the electrode so that the process of water molecules reaction becomes obstructed. It is obtained that the optimum covering of electrode surface is achieved in the addition of 9 grams of dahlia tube starch in one liter of water.Keywords: water molecule dissociation reaction, voltammograms, dahlia tuber starch, stainless steel, covering]]>
