This study aims to analyse fuel cells constructed with the artificial Black Sea water containing hydrogen sulphide (H2S) as fuel. A parametric analysis of the performance of the direct H2S/H2O2 fuel cells is conducted to investigate the effect of certain parameters on the cells operation. The effects of the concentration of anolyte and catholyte and the pH of the anolyte are investigated. Increasing the solution pH leads to increased HS- concentration of the anolyte, resulting in higher cell power. The concentration of H2O2 has a greater impact on the cell's power density than the other parameters investigated. In the present study, the fuel cell can yield a power density of 23 mW cm(-2) at a cell voltage of 300 mV and current density of 75 mA cm(-2). Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.