چکیده (انگلیسی):

In this paper we investigated the parameters determining the performance of hydrogen production by using the solar water electrolysis system (SWES), without the need of high additional electrical energy. The electrolyte after and before using in solar electrolysis was described to understand the mechanism responsible on the hydrogen production enhancement. Additionally, the employed electrolyte (deposit) was characterized by FT-IR, UV-visible and electrochemical impedance spectroscopy. As results the salt addition can obtained 40% more hydrogen efficiency. Also the pH values that varied between 3 to 6 and 8.5 to 12 could further improve hydrogen yield. The deposit provided a discriminate environment which is proposed to be responsible for the hydrogen production improvement. In addition, hydroxyl ions are mainly transported through the exchange anion, to maintain charge neutrality, and thus the anode and cathode electrode resulting in a low transport resistance. This can be assumed that the proton transport facilitated by water permeation can lower the transport resistance, and consequently increase hydrogen production.