Adsorption properties of Ni cluster modified TiO2 (1 0 1) towards SF6 decomposition gases

Online detection of insulation defects the decomposition products of SF6 plays a key role in ensuring the safe operation of the gas-insulated switchgear (GIS) equipment. The pristine TiO2 (1 0 1) modified by Ni cluster (1-3 Ni atoms) is used as a new gas-sensing material to study its gas-sensing characteristics to the characteristic decomposition products of SF6: SO2, SOF2, and SO2F2. Through density functional theory (DFT) calculation, we found that the modification of Ni clusters significantly improved the conductivity of pristine TiO2 (1 0 1) and the gas sensitivity of SF6 decomposition products. More importantly, the change of conductivity after gas adsorption lays a theoretical foundation for identifying the type and concentration of SF6 characteristic decomposition products and further judging the type of defects in GIS.

Automated summary

Using Ni cluster modified TiO2 (1 0 1) as a gas-sensing material greatly improves the conductivity and gas sensitivity to the characteristic decomposition products of SF6, which lays a theoretical foundation for identifying the type and concentration of SF6 characteristic decomposition products and further judging the type of defects in gas-insulated switchgear (GIS).