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 TMo site among TH, TMo, TTe, and TBr 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)