First-principles study demonstrates improved gas detection in transformer oil using Ni-doped PtSe2, suggesting enhanced fault diagnosis methods.
Large power transformers are widely used in power systems, and ensuring their reliable operation is crucial for power grid security. Dissolved gas analysis in oil is a mature and widely accepted method for transformer fault diagnosis. In this paper, a Ni-PtSe 2 -based method for detecting dissolved gases in oil is proposed, and the response characteristics of Ni-doped PtSe 2 to dissolved gases in oil is systematically investigated. The adsorption energies of Ni-PtSe 2 for typical dissolved gases in oil—CO, H 2 , CH 4 , C 2 H 2 , and C 2 H 4 —are -2.0525 eV, -0.6985 eV, -0.4298 eV, -1.677 eV, and -2.438 eV, respectively. CO, C 2 H 2 , and C 2 H 4 are chemically adsorption, while H 2 and CH 4 are physical adsorption. Furthermore, H 2 exhibits a strong physical adsorption interaction with the substrate. At room temperature, Ni-PtSe 2 exhibits high sensing sensitivities for CO, H 2 , C 2 H 2 , and C 2 H 4 , with sensitivities of 50.55, 42.36, 66, and 15, respectively. The adsorption recovery time for H 2 is only 0.636 s, indicating easy desorption and highlighting its excellent adsorption and sensing performance. With its ultrafast H 2 desorption kinetics and reasonable adsorption sensitivity, Ni-PtSe 2 shows promise as a reusable H 2 sensor and is a practical candidate material for H 2 detection in the field of dissolved gas analysis in oil.
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Li et al. (2026) studied this question.
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