Abstract
CF4 and COF2 are the two main decomposition products of fluorocarbon gas insulating medium. We explored the gas sensing properties of Ni-MoS2 to CF4 and COF2 based on the density functional theory calculations. The adsorption energy, charge transfer, density of states and electron density difference have been discussed. It was found that the interaction between COF2 molecule and Ni-MoS2 is strong, and the adsorption energy is 0.723 eV. Ni-MoS2 acts as the electron donor and transfers some electrons to COF2 molecule during the interaction. The adsorption energy of CF4 on Ni-MoS2 is lower than that of COF2, and the interaction between them belongs to physical adsorption. Ni-MoS2 has the potential to be used as a gas sensor for COF2 detection using in the field of gas insulated switchgear on-line monitoring.
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