Abstract
Currently, CF3SO2F shows great potential as a green insulating gas to replace SF6 in the electrical industry to support the dual-carbon program. However, it has the potential to undergo partial discharges and thus decomposition under the operating voltage of the power grid, and the gas-sensitive detection technique is an effective method to diagnose this problem. In this work, the gas-sensitive properties of the Cr2@g-CN interface for each harmful gas molecule were investigated from a microscopic point of view, using the harmful gases (SO2, HF, SO2F2, CF4) that may be produced by CF3SO2F as the detection targets. Then, the performance of Cr2@g-CN interface as a gas sensor material in practical applications was predicted. The final results revealed that the Cr2@g-CN interface is most suitable as a potential gas-sensitive material for SO2 gas sensors. The exploration of humidity effects suggests that Cr2@g-CN remains a promising SO2 gas sensing material for practical applications in specific humidity environments. This work reveals the origin of the excellent properties of Cr2@g-CN as a gas sensor material and provides new ideas for the detection of CF3SO2F decomposition products.
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