We have developed a facile procedure to load ultra-high density Pt NPs with the size of about 3 nm on the surface of Te/C coaxial nanocable based on the -OH, -COOH hydrophilic groups on the carbon surface through directly mixing the Te/C coaxial nanocable, H2PtCl6, HCOOH and water at room temperature. Comparing with carbon nanotubes, the present procedure needed neither complex functionalization process nor any additional linkers. Notably, the amount of Pt NPs on the surface of coaxial nanocables could be easily controlled via changing the amount of Te/C coaxial nanocables in the mixture. (C) 2011 Elsevier B.V. All rights reserved.