Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 45, Issue 11, Pages 7234-7242Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.12.152
Keywords
SnO2; Fast response; Low temperature; Gas sensor; Hydrogen; Electrospinning
Categories
Funding
- National Natural Science Foundation of China [U1537211]
- Fundamental Research Funds for the Central Universities [2019CDXYDQ0010]
- Chongqing Municipal Human Resources and Social Security Bureau [CX2017041]
- National 111 Project of the Ministry of Education of China [B08036]
- National Key Basic Research Program of China (973 Program) [2015CB251003]
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In this work, we introduced a structure of Pd coated SnO2 nanofiber rods (NFRs) prepared by electrospinning and magnet sputtering. Pd was first deposited on the obtained nano fibers as a catalyst and then fully dispersed during the resulting of SnO2 to improve the hydrogen response. The gas sensing tests showed the palladium enhanced the hydrogen response at low temperature (160 degrees C). When the hydrogen gas concentration was 100 ppm, the limit of detection (LOD) of sensor was as low as 0.25 ppm and the response time was as short as 4 s. Moreover, Pd coated SnO2 also had excellent hydrogen selectivity and repeatability. The gas sensor was suitable for the detection of hydrogen in low-temperature environment. This work provided a new method for the low temperature hydrogen gas sensor with a fast response and low LOD. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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