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

A DFT study

authored by

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.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

External Organisation(s)

Chongqing Institute of Technology

Type

Article

Journal

Physica E: Low-Dimensional Systems and Nanostructures

Volume

146

ISSN

1386-9477

Publication date

01.2023

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Condensed Matter Physics

Electronic version(s)

https://doi.org/10.1016/j.physe.2022.115568 (Access: Closed)