Highly Sensitive Ammonia Gas Sensors at Room Temperature Based on the Catalytic Mechanism of N, C Coordinated Ni Single-Atom Active Center.

ABSTRACT: Significant challenges are posed by the limitations of gas sensing mechanisms for trace-level detection of ammonia (NH₃). In this study, we propose to exploit single-atom catalytic activation and targeted adsorption properties to achieve highly sensitive and selective NH₃ gas detection. Specifically, Ni single-atom active sites based on N, C coordination (Ni-N-C) were interfacially confined on the surface of two-dimensional (2D) MXene nanosheets (Ni-N-C/Ti₃C₂T_x), and a fully flexible gas sensor (MNPE-Ni-N-C/Ti₃C₂T_x) was integrated. The sensor demonstrates a remarkable response value to 5 ppm NH₃ (27.3%), excellent selectivity for NH₃, and a low theoretical detection limit of 12.1 p

SUBMITTER: Quan W 

PROVIDER: S-EPMC11349725 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature