Room-temperature NH3 gas sensor based on atomically dispersed Co with a simple structure

Abstract

Nowadays, in order to realize gas sensing for NH₃ at room temperature, gas sensors are becoming more and more complex in structure. As a new emerging material, atomically dispersed (AD) Co also shows great potential in gas sensor fields because of its unique structural and electronic properties. For the first time, AD CoNC with a simple structure was utilized for NH₃ detection at room temperature, which exhibited high stability as well as selectivity. The as-prepared AD CoNC material was characterized by various techniques to show the morphology and existing form of the Co atoms. The sensing behavior of an AD CoNC gas sensor was measured systematically. In addition, the gas sensing mechanism at room temperature for NH₃ is also discussed in depth. This indicates that AD CoNC as well as other ADs could act as NH₃ gas sensors with great prospects.