Since Pt is an expensive noble metal, enhancement of activity of Pt-based catalysts is important. In the present study, effects of reduction methods of Pt precursor on activity of supported platinum catalysts were investigated. Activities of the prepared catalysts were evaluated through conversion of biomass compounds to hydrogen-rich gas mixture by aqueous-phase reforming. The results indicated that thermal reduction of Pt precursor (platinum (IV) chloride) under N-2 flow produced more active catalyst compared to H-2 flow for hydrogen-rich gas production by aqueous-phase reforming (APR). Performing reduction process with chemical reduction using NaBH4 reducing agent that followed by thermal treatment significantly improved the catalyst activity. The use of ethylene glycol during impregnation of Pt precursor did not cause an increase in activity. The preparation of nano-sized and uniform Pt deposited catalysts was highly dependent on the type of support used. In this case, AC is the best support compared to alumina and titanium dioxide. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.