Fabrication of Catalytic Combustion Hydrogen Gas Sensor with Pt/CeO2 Nanofiber for Room Temperature.
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초록
내용
Hydrogen has been proposed as the most desirable and efficient energy source that can potentially replace fossil fuels and reduce greenhouse gas emissions. However due to hydrogen gas's wide flammability range (4-75%), low ignition energy requirement for burning, and explosion hazard as a colorless, odorless gas, detection is becoming more crucial. In this study, CeO2 with high oxygen vacancy was used for a catalytic combustion type gas sensor capable of operating at room temperature, and alkali oxide CeO2 was used as a platinum catalyst support instead of noble metal Ru to prevent poisoning by carbon monoxide. The CeO2 nanofiber was synthesized through electrospinning to increase the contact surface area with hydrogen. Catalysts synthesized with CeO2 were shown to maintain combustion temperatures after exposure to carbon monoxide compared to other metal oxides. Pt/CeO2 can detect a wide range of hydrogen concentrations and maintain its durability after repeated hydrogen exposure tests.