Adsorption and gas-sensing performances of C₂H₂, C₂H₄, CO, H₂ in transformer oil on Pt-doped MoTe₂ monolayer

A DFT study

verfasst von

Tianyan Jiang, Wentao Zhang, Tao Zhang, Haoxiang Yuan, Maoqiang Bi, Xin Zhou

Abstract

In this paper, the DFT method is employed to analyze the sensing and adsorption performance intrinsic MoTe₂ and Pt doped MoTe₂ to the characteristic oil dissolved gases (C₂H₂, C₂H₄, CO, and H₂). The value of binding energy demonstrates Pt atom prefer to be trapped at T_Mo site among T_H, T_Mo, T_Te, and T_Br sites. Pt–MoTe₂ depicts the excellent adsorption property to the four gases compared with MoTe₂. Based on the change of band gap, the conductivity and sensitivity of Pt–MoTe₂ decreases and increases after adsorption of four gases. The moderate recovery time reveals the higher gas-sensing and response of Pt–MoTe₂ to C₂H₂ and C₂H₄ than to CO and H₂. This paper provides theoretical guidance of potential application of a novel and high-performance gas sensor for online-monitoring the characteristic dissolved gases in transformer.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Externe Organisation(en)

Chongqing Institute of Technology

Typ

Artikel

Journal

Physica E: Low-Dimensional Systems and Nanostructures

Band

146

ISSN

1386-9477

Publikationsdatum

01.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Atom- und Molekularphysik sowie Optik, Physik der kondensierten Materie

Elektronische Version(en)

https://doi.org/10.1016/j.physe.2022.115568 (Zugang: Geschlossen)