Facial fabrication of an inorganic/organic thermoelectric nanocomposite based gas sensor for hydrogen detection with wide range and reliability |
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| Affiliation: | 1. Electrochemistry Department, Korea Institute of Materials Science, Changwon, 51508, Republic of Korea;2. Department of Fusion Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea;3. Department of Materials Science & Engineering, Gachon University, Seongnam 13120, Republic of Korea;1. Department of Mathematics, Karnatak University, Pavate Nagar, Dharwad, 580003, India;2. Department of Computer Science (MCA), KLE Technological University, BVB Campus, Hubli, 580031, India;1. I.E. Tamm Theory Department, P.N. Lebedev Physical Institute of Russian Academy of Sciences, Moscow 119991, 53 Leninskii prosp., Russian Federation;2. Far Eastern Federal University, 8 Suhanova St., Vladivostok 690950, Russia;3. KIT – Karlsruhe Institute of Technology, Institute of Technical Thermodynamics, Engelbert-Arnold-Strasse 4, Building 10.91, D-76131, Karlsruhe, Germany;1. Clean Energy Research Lab (CERL), Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan;2. University of Education, Township, Lahore 54000, Pakistan;3. Sustainable Energy Technologies Center, King Saud University, Riyadh, Saudi Arabia;4. University of Okara, Okara, Pakistan;1. Dept. Mecánica de Fluidos y Propulsión Aeroespacial, ETS Ingeniería Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Plza. Cardenal Cisneros 3, Madrid 28040, Spain;2. Dept. Arquitectura, Construcción y Sistemas Oceánicos y Navales, ETSI Navales, Universidad Politécnica de Madrid, Avda. de la Memoria 4, Madrid 28040, Spain;3. Dept. Química Física I, Facultad de C.C. Químicas, Universidad Complutense de Madrid, Plza. de Ciencias 2, Madrid 28040, Spain;1. Department of Physics, Siddaganga Institute of Technology, Tumkur, Karnataka, 572103, India;2. Department of Physics, Karnatak University Dharwad, Karnataka, 580003, India |
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| Abstract: | A novel method for fabrication of a thermochemical hydrogen (TCH) gas sensor composed of platinum (Pt)-decorated graphene sheets and a thermoelectric (TE) polymer nanocomposite was investigated. The hydrogen sensing characterization for the device included gas response, response time (T90), recovery time (D10), and reliability testing, which were systematically conducted at room temperature with a relative humidity of 55%. Here, the Pt-decorated graphene sheets act as both an effective hydrogen oxidation surface and a heat-transfer TE polymer nanocomposite having low thermal conductivity. This 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 TCH gas sensor can detect the range of hydrogen from 100 ppm to percentage level with good linearity. The best response and recovery time revealed for the optimized TCH gas sensor were 23 s and 17 s under 1000 ppm H2/air, respectively. This type of sensor can provide an important component for fabricating thermoelectric-based gas sensors with favorable gas sensing performance. |
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| Keywords: | Hydrogen sensor Thermoelectrics Inorganic/organic nanocomposite Pt-decorated graphene sheet Segregated structure |
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