Enhanced H2 gas sensing properties by Pd-loaded urchin-like W18O49 hierarchical nanostructures

Sea urchin-like Pd loaded-W18O49 nanostructures were synthesized by two-step approach including a hydrothermal reaction and a subsequent incipient wetness impregnation process. Compared with Pd-WO3 and pure W18O49 sensors, Pd-W18O49 sensor shows a remarkable response to H2 at low working temperatures.