Hydrogen is one of the potential alternatives to fossil fuels, but it is highly flammable, so if you want to develop a hydrogen energy economy, sensors that detect hydrogen are indispensable. However, the biggest challenge of hydrogen sensors so far is that higher temperatures are required to function, and the sensitivity is lower and the reaction time is slower. Researchers from the Delft University of Technology (TU Delft) in the Netherlands claim that they have overcome the above challenges and developed a new type of sensor made of thin layers of tungsten trioxide (WO3). High resistance and the ability to sense hydrogen using a platinum catalyst can sense a hydrogen concentration of 1 pppm near room temperature, and a reaction time of less than 1 second when the hydrogen concentration exceeds 100 pppm. It is understood that the researchers first made a thin layer of tungsten trioxide by a method called pulsed laser deposition, so that the material layer can be deposited separately on a substrate. Using this method, the researchers made a thin layer of tungsten trioxide with a thickness of only 9 nm. The researchers then placed a platinum drop at the top of the thin layer of tungsten trioxide; platinum has a well-known property that acts as a catalyst for separating hydrogen molecules into individual hydrogen atoms, and the researchers observed that those atoms could Enter the crystal lattice of tungsten trioxide and slowly convert it from insulator to metal. The researchers' experiments exposed the tungsten trioxide film to different environmental conditions, including normal air, a hydrogen-mixed environment, and a vacuum. The experimental results show that the resistance and sample color (optical image display) will be It changes when exposed to hydrogen, but returns to its original state in normal air. The new hydrogen sensor developed by TU Delft is the biggest difference from other similar sensors in that it can be used at room temperature. Because the film is compatible with current semiconductor technologies, the new hydrogen sensor has the potential to be mass-produced, and the research team is preparing to patent the technology. Plastic Fence Mesh,Safety Barrier Mesh Fencing,Plastic Fence Mesh Roll,Green Plastic Coated Wire Fencing Hebei Yintop Technology Co.ltd , https://www.yintopplasticfilm.com
The Netherlands has developed a hydrogen sensor that can be used at room temperature.