In this work, we investigated the properties of resistivity type hydrogen (H-2) sensor for monitoring in H-2 gas. The H-2 sensor was made of Pd nanocube (NCs) and TiO2 nanofiber (NFs) composites. The Pd NCs was synthesized by seed-mediated growth and TiO2 nano fiber was synthesized via electrospinning method. The two nanomaterials are then converted into nanocomposites by ultrasonication process. Pd NCs-TiO2 NFs composite was characterized by scanning electron microscope (SEM) and high resolution transmission electron microscope (HRTEM). The H-2 sensing properties including the response/recovery time, the response value and linearity of the synthesized samples were investigated toward to various H-2 concentrations (0.6, 0.8 and 1%). The response of H-2 sensor is S = 40.8% and the response/recovery time are 25/1 s with 0.6% at working temperature of 150 degrees C. Moreover, the H-2 sensor has excellent cross-selectivity for H-2 compared to ethanol, nitrogen dioxide and isopropyl alcohol. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.