NiO and CuO Decorated Janus PtSeTe for Transformer Fault Gas Detection

Area of Science:

• Materials Science
• Computational Chemistry
• Chemical Engineering

Background:

• Dissolved gas analysis in transformer oil is crucial for real-time power equipment performance evaluation.
• Understanding gas-material interactions is key to developing advanced sensors.

Purpose of the Study:

• To investigate the interaction mechanisms between four fault gases (H2, CO, C2H2, C2H4) and pristine and metal oxide-decorated PtSeTe materials.
• To evaluate the potential of these materials for online monitoring of fault gases in power equipment.

Main Methods:

• First-principles calculations were employed to examine gas adsorption and electronic properties.
• Density Functional Theory (DFT) was used to analyze interaction mechanisms, bandgap, work function, and desorption kinetics.

Main Results:

• Pristine PtSeTe showed weak physisorption; metal oxide decoration significantly enhanced adsorption and electronic response.
• CuO-decorated PtSeTe exhibited an ultranarrow bandgap (0.16 eV) and high sensing sensitivity with rapid reversibility for C2H2 and C2H4.
• NiO-decorated PtSeTe demonstrated strong hydrocarbon adsorption due to a high desorption barrier, suitable for adsorbent applications.

Conclusions:

• CuO-decorated PtSeTe shows significant potential for sensitive and reversible online monitoring of specific fault gases.
• NiO-decorated PtSeTe is promising as a high-efficiency adsorbent for hydrocarbons.
• Theoretical simulations provide valuable insights into designing novel gas sensing materials.