Abstract
A highly sensitive and flexible hydrogen sensor based on organic nanofibers decorated by Pd nanoparticles (NPs) was designed and fabricated for low-concentration hydrogen detection. Pd NPs were deposited on organic nanofiber materials by DC magnetron sputtering. The temperature dependence of the sensitivity at 25 ppm H2 was characterized and discussed, and the maximum response of the sensor increased linearly with increasing measurement temperature. Performances of the hydrogen sensor were investigated with hydrogen concentration ranging from 5 ppm to 50 ppm. This sensor exhibits high sensitivity, with the response up to 6.55% for H2 as low as 5 ppm, and the output response of the hydrogen sensor increased linearly with the square root of hydrogen concentration. A cycling test between pure nitrogen and 25 ppm hydrogen concentration was performed, and the hydrogen sensor exhibited excellent consistency.
Highlights
Hydrogen gas is one of the most promising cleaning energy sources due to its high combustion efficiency and zero pollution to the environment
Low concentration hydrogen detection is of great importance for the space exploration
The measurement thethe hydrogen sensor was carried with aa self-developed measurement
Summary
Hydrogen gas is one of the most promising cleaning energy sources due to its high combustion efficiency and zero pollution to the environment. The hydrogen sensor with high sensitivity and repeatability, especially in the low. InIn this paper, system was was designed designed this paper,a alow lowHH2 2concentration concentrationsensor sensorbased basedon onan an organic organic nanofiber nanofiber system and fabricated. Pd nanoparticles (NPs) were deposited on the organic improve the hydrogen response performance. Pd nanoparticles (NPs) were deposited on the organic nanofibers by by the the sputtering sputtering technology, technology, which which isis aa fascinating fascinating method method with with convenience convenience for for the the nanofibers fabrication of hydrogen sensors. The performances of the hydrogen sensor under different HH22 concentrationsand andoperating operatingtemperatures temperatures were characterized, repeatability ofsensor the sensor concentrations were characterized, andand the the repeatability of the was was tested and discussed
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