Dissolved gas detection is very important for an oil-immersed
transformer
fault. We examined the adsorption characteristics and sensitivity
processes of monolayer NbSe2 doped with Ag, Pd, and Pt
on five typical gases (H2, CO, CO2, CH4, and C2H2) in oil-immersed transformer using
first-principles calculations. While the Pd–NbSe2 system only has great desorption properties for H2 at
high temperature, the Ag/Pt–NbSe2 system has outstanding
adsorption and desorption possessions for H2 at ambient
and high temperature. Therefore, micro-nanomaterials prepared by Ag/Pd/Pt–NbSe2 are expected to be used as sensors for detecting H2. The micro-nanomaterials prepared by NbSe2 and Ag/Pd/Pt–NbSe2 systems can be used for C2H2 desorption
at ambient temperature and high temperatures, but the desorption effect
is not excellent. Micro-nanomaterials prepared by NbSe2 and Pd/Pt–NbSe2 have excellent adsorption and
desorption performance for CH4 and CO2 desorption
at ambient temperature and are candidates for CH4 and CO2 sensors. This paper systematically studies the potential
application of a metal-doped monolayer NbSe2 system in
transformer oil gas dissolution and provides theoretical guidance
for metal-doped NbSe2 micro-nanomaterials for transformer
oil gas detection. It is theoretically proven that the metal-doped
monolayer NbSe2 micro-nanomaterials provides an excellent
scheme for detecting dissolved gas in transformer oil.