The present work reports the synthesis and hydrogen storage properties of different types of boron nitride (BN) nanostructures prepared by an in situ silica-assisted catalytic chemical vapor deposition technique. The BN nanostructures have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Brunauer, Emmett, and Teller (BET), Raman spectroscopy and Fourier transform infrared (FTIR) spectroscopy studies. The hydrogen storage properties of BN nanostructures have been investigated using a high-pressure Seiverts' apparatus in the pressure range of 1-100 bar and at 298 K. The dependence of hydrogen storage capacity on the morphology of BN nanostructures is discussed in detail. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.