Abstract：
In recent years, hydrogen has gained attention as a potential solution to replace fossil fuels, thus reducing greenhouse gas emissions. The development of ever improving hydrogen sensors is a topic that is constantly under study due to concerns about the inherent risk of leaks of this gas and potential explosions. In this work, a new, long-term, stable phosphorene-based sensor was developed for hydrogen detection. A simple functionalization of phosphorene using urea was employed to synthesize an air-stable material, subsequently used to prepare films for gas sensing applications, via the drop casting method. The material was deeply characterized by different techniques (scanning electron microscopy, X-ray diffraction, X-ray photoelectron, and Raman spectroscopy), and the stability of the material in a noninert atmosphere was evaluated. The phosphorene-based sensor exhibited high sensitivity (up to 700 ppm) and selectivity toward hydrogen at room temperature, as well as long-term stability over five months under ambient conditions. To gain further insight into the gas sensing mechanism over the surface, we employed a dedicated apparatus, namely operando diffuse reflectance infrared Fourier transform, by exposing the chemoresistive sensor to hydrogen gas under dry air conditions.
摘要：
近年来,氢作为替代化石燃料的潜在解决方案已经引起了人们的关注，从而减少温室气体排放。由于担心这种气体泄漏和潜在爆炸的固有风险，不断改进的氢传感器的开发是一个不断研究的主题。在这项工作中,一个新的,长期的,开发了稳定的基于磷烯的氢检测传感器。使用尿素对磷烯进行简单的官能化，以合成空气稳定的材料，随后用于制备气体传感应用的薄膜，通过滴注法。该材料通过不同的技术进行了深入的表征(扫描电子显微镜，X射线衍射,X射线光电子,和拉曼光谱)，并评价了材料在非惰性气氛中的稳定性。基于磷烯的传感器在室温下表现出高灵敏度（高达700ppm）和对氢的选择性，以及在环境条件下五个月的长期稳定性。为了进一步了解表面上的气体传感机制，我们用了一个专用的仪器，即operando漫反射红外傅里叶变换，通过在干燥空气条件下将化学电阻传感器暴露于氢气。
