Amperometric hydrogen gas sensor based on Pt/C/Nafion electrode and ionic electrolyte

In the present work, an amperometric electrochemical hydrogen (H2) sensor was fabricated by solid polymer electrolyte and screen-printed electrodes (SPE). The carbon electrode modified by Pt/C/Nafion film gave an enhanced sensitivity. The Pt/C/Nafion suspension could be directly added dropwise to the carbon electrodes for modification, which was simple and efficient. For hydrogen sensors, it was proved that hydrogen and Pt nanoparticles in aprotic electrolyte were the electrochemical behavior of single electron transfer in an anaerobic environment and the coupling electrochemical behavior with oxygen in an aerobic environment. A solid amperometric gas sensor was fabricated by a 3D printing package with a solid polymer electrolyte and porous ceramic subtracts printed with modified electrodes. It was indicated that the sensor device fabrication was quite simple; however, the sensitivity could be greatly improved. ●Solid-state polymer electrochemical hydrogen sensor based on porous ceramic substrate and screen-printed carbon electrode.●Simple, fast and low-cost Pt/C/Nafion film modified carbon electrode.●A well-established electrochemical sensing mechanism for hydrogen in aerobic and anaerobic conditions.●Nylon package with small volume and easy integration based on 3D printing.