Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 234, Issue -, Pages 435-445Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.013
Keywords
Pt/Pd bimetal; Ultra-thin film; Hydrogen sensor; Fast response-recovery time; PLD
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2014R1A2A2A01002668]
- MOTIE (Ministry of Trade, Industry and Energy), Korea, under the Eco-friendly Fuel Cell Testbed program
Ask authors/readers for more resources
This study presents the fast response-recovery characteristics of an ultra-thin discrete platinum/palladium (Pt/Pd) bimetallic film-based hydrogen (H-2) sensor. Pt/Pd bimetallic nanoparticles (NPs) with a size of 2-11 nm were deposited on an alumina (Al2O3) substrate using a pulsed laser deposition (PLD) method. The metal loading and the composition of the Pt/Pd NPs were carefully controlled by varying the deposition conditions of the PLD system. The resultant discrete Pt/Pd bimetallic ultra-thin film was applied as a new H-2 detection material, in which the fabricated Pt (3 nm)/Pd (3 nm) film showed noteworthy advantages, such as a large detection range of 10-40,000 ppm, high response magnitude, and fast response-recovery time. For a 10,000 ppm (1 vol.%) H-2 concentration at 150 degrees C, a maximum sensor response of 13.56% and a response-recovery time of 4/5 s were observed. The observed fast response-recovery time characteristics can be attributed to the enhanced hydrogen-induced changes in the work function of the Pt/Pd ultra-thin film. The fabricated sensor also exhibits good reproducibility and a negligible humidity effect within the entire detection range. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available