High-Performance HS Sensors to Detect SF Leakage.

Detecting HS in oxygen-deficient conditions is vital for identifying leaks in SF-insulated electrical equipment. Current infrared-based detection methods are expensive and sensitive to environmental conditions, highlighting the necessity for cost-effective and stable gas sensors. Existing gas sensors based on semiconducting metal oxides (SMOXs) are limited by redox reactions with oxygen and require high operating temperatures. Here, we introduce a room-temperature (RT) HS sensor for oxygen-deficient environments using the intrinsic conducting two-dimensional (2D) metal-organic framework (MOF), CoNi(hexaiminotriphenylene) [CoNi(HITP)], overcoming the limitations of SMOX gas sensors. Remarkably, CoNi(HITP) sensors exhibit exceptional selectivity for HS with negligible cross-responses and a sensitivity drift of less than 4.13% in an SF atmosphere over 60 days. The CoNi(HITP) gas sensor shows significant promise for real-time and stable monitoring of HS gas in oxygen-deficient environments.