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연구성과 > 금주의 우수논문

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SCI Article

Pt/Graphene Catalyst and Tellurium Nanowire-Based Thermochemical Hydrogen (TCH) Sensor Operating at Room Temperature in Wet Air
성명 좌용호 ()
소속 공학대학 재료화학공학과
캠퍼스
우수선정주 2020년 01월 2째주
Author
Corresponding Author Info Choa, YH (reprint author), Hanyang Univ, Dept Mat Sci & Chem Engn, Ansan 15588, South Korea.; Choa, YH (reprint author), Hanyang Univ, Dept Fus Chem Engn, Ansan 15588, South Korea.
E-mail 이메일choa15@hanyang.ac.kr
Document Type Article
Source ACS APPLIED MATERIALS & INTERFACES Volume:11 Issue:50 Pages:47015-47024 Published:2019
Times Cited 0
External Information http://dx.doi.org/10.1021/acsami.9b12604
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.
Web of Science Categories Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
Funding Nano.Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2016M3A7B4900044]; National Research Foundation of Korea (NRF) - Korea government (MSIT) [2015R1ASA1037548
Language English
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