The high pressure H-2 sorption isotherms for vanadium pentoxide foam (VOF) were obtained at a liquid nitrogen temperature. The enhancement of hydrogen storage capacity occurred in as-prepared VOF (similar to 1.0 wt%) in contrast to that in pristine vanadium pentoxide (similar to 0.2 wt%). The maximum capacity of hydrogen storage (similar to 2.0 wt%) was achieved by thermal annealing at T-a = 623 K. The enhancement of hydrogen storage in VOF is attributed to the morphological modulation by thermal annealing. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.