NOVELTY - Method of manufacturing a metal loaded nanostructured material, comprises: reacting an unoxidized nanostructured material and a polyelectrolyte in a dispersion of the untreated nanostructured material and the polyelectrolyte; and dispersing the reacted nanostructured material obtained in the previous step and a noble metal precursor in a solution comprising a suitable reducing agent under conditions allowing reducing and depositing of the noble metal precursor on the reacted nanostructured material to obtain a nanostructured material loaded with metal particles.    USE - The method is useful for manufacturing a metal loaded nanostructured material, which is: spheres, cubes, nanotubes (single-walled, double-walled or multi-walled nanotubes), nanowires (also called nanofibers), nanorods, nanoflakes, nanoparticles, nanodiscs, nanofilms and combinations of the above nanostructured materials in a mixture; and useful for an electrode (all claimed) for manufacturing a fuel cell or a metal-hydride battery.    ADVANTAGE - The method: avoids the formation of structural damages of the nanostructured material but also yields a higher density binding of polyelectrolytes on the surface of the nanostructured material; and provides more active binding sited for the adsorption of metal particle precursors and deposition of metal particles on the surface of the nanostructured material, thus improves the catalytic performance of such metal particle loaded nanostructured material when used as catalysts, such as in fuel cells and metal-hydride batteries.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) a nanostructured material loaded with noble metal particles, where a polyelectrolyte is bound to the nanostructured material and the noble metal particles are bound to the polyelectrolyte, and the particles have a size of 1-10 nm;    (2) a nanostructured material made of a carbon material covered with a layer of a noble metal or a metal oxide;    (3) an electrode comprising a nanostructured material obtained by the method; and    (4) a method of manufacturing an electrode comprising forming the nanostructured material by the method or a nanostructured material into a membrane.