Fully eco-friendly H2 sensing device based on Pd-decorated graphene

A graphene (GR) hybrid decorated with Pd nanoparticles (NPs), synthesized through a wholly eco-friendly process, was characterized as chemiresistive material towards H-2. Fast and selective detection of hydrogen operating at environmental conditions was achieved. Devices based on PdNPs/GR were able to detect hydrogen in the range of flammability showing a 14% relative conductance variation at 0.2% H-2 concentration at room temperature and 50% of Relative Humidity. The impact of the common interferents, namely oxygen and water, on the gas sensor device operating at room temperature behaviour, was evaluated. The sensing performances reported herein are perfectly in agreement with those of other graphene hybrid composites-based devices found in the literature and demonstrate the soundness of our approach, with the key difference that the proposed fabrication process is environmentally friendly. (C) 2016 Elsevier B.V. All rights reserved.