| 학회 |
한국재료학회 |
| 학술대회 |
2019년 봄 (05/15 ~ 05/17, 평창 알펜시아 리조트) |
| 권호 |
25권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Fabrication of Organic/inorganic Hybrid Thermoelectric Composite Based Hydrogen Gas Sensor with Hydrogen Oxidation Catalyst |
| 초록 |
Hydrogen gas, attracting energy source as one of an alternative fossil fuel, has wide range of explosive concentration in atmosphere. Fast sensible property such as fast response time is most important as hydrogen sensor. Temperature change derived by reaction heat is suit for sensing. Thermoelectric based hydrogen (TEH) gas sensor composed of a thermoelectric polymer nanocomposite with platinum decorated graphene sheets was investigated which can sensing based temperature difference driven hydrogen oxidation reaction. The hydrogen sensing properties are included gas response, response time (T90), recovery time (D10), and reliability testing, which were systematically conducted at room temperature. Here, the Platinum decorated graphene sheets act as both an effective hydrogen oxidation surface and a heat-transfer TE polymer nanocomposite having low thermal conductivity and selective hydrogen adsorb able substrate. The TEH sensing property plays an important role in generating output voltage signal with a temperature difference between the top and bottom surfaces of the nanocomposite. As a result, our TEH gas sensor can sense the range of hydrogen from 100 ppm to percentage level with linear signal intensity by hydrogen concentration. The fastest response and recovery time showed for the optimized TEH gas sensor were 23 s and 17 s under 1000 ppm H2/air, respectively. |
| 저자 |
송요셉1, 김세일2, 황태연3, 임재홍4, 좌용호1
|
| 소속 |
1한양대, 2한국기계(연), 3한국과학기술(연), 4가천대 |
| 키워드 |
Hydrogen sensor; Thermoelectrics; Organic/inorganic hybrid composite; Hydrogen oxidative catalyst; Segregated structure
|
| E-Mail |
|
