{Reference Type}: Journal Article
{Title}: 2D Amino-Functionalized Black Phosphorus: A New Approach to Improve Hydrogen Gas Detection Performance.
{Author}: Rossi A;Impemba S;Serrano-Ruiz M;Caporali M;Fabbri B;Valt M;Gaiardo A;Filippi J;Vanzetti L;Banchelli M;Vincenzi D;Guidi V;
{Journal}: ACS Appl Mater Interfaces
{Volume}: 16
{Issue}: 30
{Year}: 2024 Jul 31
{Factor}: 10.383
{DOI}: 10.1021/acsami.4c06137
{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.