有机氢传感器在安全关键环境中的潜在应用
Organic Hydrogen Sensors for Potential Use in Safety-Critical Environments
AI总结：
本研究提出了一种基于有机分子的新型氢气传感器，无需催化金属，具有高灵敏度和可调响应时间，适用于燃料电池等安全关键环境的实时监测。
摘要：
准确监测氢气浓度对于优化燃料电池性能、减少 purge 损失和减少长期降解至关重要。传统氢气传感器通常依赖催化材料，并在燃料电池环境中面临需要氧气净化的限制。在这里，我们报告了一种基于有机分子的新型氢气传感机制，无需使用催化金属。该传感器基于典型的垂直堆叠几何结构，含有 Alq3 作为活性有机材料。在暴露于氢气时，设备显示出电阻率的增加，产生一个可靠的传感器信号，该信号与氢气浓度、温度和湿度呈线性变化，并在 100%vol 氢气时表现出高达 3.5% 的相对响应。通过将传感器暴露于外部磁场，发现传感器响应的上升和下降时间可以调节。这种新型有机传感器在燃料电池相关条件下以及更广泛范围内表现出对氢气浓度的灵敏度。这种新型氢气传感器具有高微型化潜力和成本效益，为燃料电池、化工行业或能源存储应用中的实时氢气监测和先进控制策略铺平了道路。
英文摘要：
Accurate monitoring of the hydrogen concentration is critical for optimizing fuel cell performance, minimizing purge losses, and reducing long-term degradation. Conventional hydrogen sensors often rely on catalytic materials and face limitations such as the need of oxygen purging when operated in fuel cell environments. Here, we report the discovery of a novel hydrogen-sensing mechanism based on organic molecules, without the use of catalytic metals. The sensor is based on a typical vertical stack geometry, containing $\mathrm{Alq_3}$ as active organic material. Upon exposure to hydrogen, the device shows an increase in resistivity, yielding a reliable sensor signal that varies linearly with hydrogen concentration, temperature, and humidity, and exhibits a relative response of up to 3.5 % at 100 %vol hydrogen. By exposing the sensor to an external magnetic field, the rise and fall times of the sensor response were found to be tunable. This novel organic sensor demonstrates sensitivity across a wide range of hydrogen concentrations under fuel cell-relevant conditions and beyond. This new class of hydrogen sensors with high miniaturization potential and cost efficiency paves the way for real-time hydrogen monitoring and advanced control strategies in fuel cells, the chemical industry, or energy storage applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
