Hydrogen monitoring systems are being very important actually since the wide development of H2 gas carriers, Hydrides Batteries and solid hydrogen media for energy purposes. Detection technologies should meet the requirement for each practical application (ie. fast and high sensitivity).
Hydrogen has the highest energy per mass of any fuel and can be produced sustainably. However, it is also flammable, making sensors that can detect it an absolute necessity for the transition to a hydrogen economy. Various types of hydrogen sensors already exist, but most of these sensors require high temperatures in order to function. Researchers at TU Delft have now developed a highly sensitive and versatile hydrogen sensor that works at room temperature. The sensor is made of a thin layer of a material called tungsten trioxide.
More information: Giordano Mattoni et al. Single-Crystal Pt-Decorated WO3 Ultrathin Films: A Platform for Sub-ppm Hydrogen Sensing at Room Temperature, ACS Applied Nano Materials (2018). DOI: 10.1021/acsanm.8b00627