The field of gas sensing has witnessed rapid and transformative progress through the integration of 2D materials, which exhibit unique physicochemical properties ideal for next‐generation sensor platforms. These atomically thin materials possess exceptional features such as a high surface exposure, tunable conductivity, and superior mechanical adaptability, making them particularly effective in detecting trace levels of various gases. Their minimal thickness and intrinsic electronic versatility enable enhanced performance metrics, including improved sensitivity, fast response times, and better selectivity. This review explores the recent innovations in gas sensor technologies, leveraging a wide range of 2D materials and their composite structures. Emphasis is placed on the roles of graphene, transition metal dichalcogenides, MXenes, metal oxides, elemental 2D materials like Xenes (e.g., borophene), and their functional hybrids. In addition to showcasing the versatile capabilities of these materials, this review also examines current challenges and limitations. It aims to offer a comprehensive perspective on the potential of 2D‐based systems to transform gas‐sensing approaches and to inform future research in this rapidly advancing field.
Ansari et al. (2025) studied this question.