▎ 摘　　要

In this work, we report on the hydrogen (H-2) sensing behavior of reduced graphene oxide (RGO)/molybdenum disulfide (MoS2) nano particles (NPs) based composite film. The RGO/MoS2 composite exhibited a highly enhanced H-2 response (similar to 15.6%) for 200 ppm at an operating temperature of 60 degrees C. Furthermore, the RGO/MoS2 composite showed excellent selectivity to H-2 with respect to ammonia (NH3) and nitric oxide (NO) which are highly reactive gas species. The composite's response to H-2 is 2.9 times higher than that of NH3 whereas for NO it is 3.5. This highly improved H-2 sensing response and selectivity of RGO/MoS2 at low operating temperatures were attributed to the structural integration of MoS2 nanoparticles in the nanochannels and pores in the RGO layer.