In this study, we perform experimental investigations of a novel hybrid photocatalytic hydrogen production reactor for a Cu-Cl cycle. The effects of different operating conditions, such as solar light intensity, mass of zinc sulfide and mass of Cu-Cl on rate of hydrogen production are studied. The experimental results show that the photocatalytic hydrogen production rate increases from 0.21 to 0.50 mu g/s with an increase in solar light intensity, mass of CuCl and mass of ZnS from 400 to 500 W/m(2), 5-10 g and 2-4 g, respectively. It is also observed that increasing the solar light intensity and the mass of ZnS from 400 to 500 W/m(2) and 2-4 g, respectively results in increase in hydrogen production rate from 0.28 to 0.48 mu g/s. The experimental results further show that replacing the electrolyzer component of Cu-Cl with the studied hybrid photocatalytic reactor can help in making the Cu-Cl cycle more environmentally benign. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.