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Pt/graphene Catalyst and Tellurium Nanowire-based Thermochemical Hydrogen (TCH) Sensor Operating at Room Temperature in Wet Air

Title
Pt/graphene Catalyst and Tellurium Nanowire-based Thermochemical Hydrogen (TCH) Sensor Operating at Room Temperature in Wet Air
Author
좌용호
Keywords
hydrogen gas sensor; tellurium nanowires; thermoelectric gas sensor; Pt-decorated graphene; hydrogen oxidation catalyst
Issue Date
2019-12
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v. 11, No. 50, Page. 47015-47024
Abstract
We present a thermochemical hydrogen (TCH) gas sensor fabricated with Pt-decorated exfoliated graphene sheets and a tellurium nanowire-based thermoelectric (TNTE) layer operating at room temperature in wet air. The sensor device was able to detect 50 ppm to 3% of hydrogen gas within several seconds (response/recovery times of 6/5.1 s at 4000 ppm of hydrogen gas) at room temperature due to the relatively high surface area of homogeneously dispersed Pt nanocrystals (similar to 8 nm) decorated on graphene sheets and the excellent Seebeck coefficient (428 mu 4V/K) of the TNTE layer. Furthermore, it was observed that the effect of the relative humidity on sensing properties was greatly minimized by incorporating Pt-decorated graphene sheets. These results indicate that our device has great potential as a low power consumption gas sensor for IoTs.
URI
https://pubs.acs.org/doi/abs/10.1021/acsami.9b12604https://repository.hanyang.ac.kr/handle/20.500.11754/122224
ISSN
1944-8244; 1944-8252
DOI
10.1021/acsami.9b12604
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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