DOI: https://doi.org/10.9767/bcrec.19788

Theoretical Study of Methane Dissociation on Pt(111) Surface Using Density Functional Theory (DFT) Calculations

1Department of Chemical Engineering, The University of Technology, Baghdad, 10066, Iraq

2Department of Chemical, Paper, and Biomedical Engineering, Miami University, 64 Engineering Building 650 E. High St, Oxford, OH 45056, United States

Received: 2 Aug 2023; Revised: 29 Sep 2023; Accepted: 30 Sep 2023; Available online: 2 Oct 2023; Published: 15 Oct 2023.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2023 by Authors, Published by BCREC Group
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
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Abstract

In this work, methane (CH4) dissociation on Pt(111) surface dissociation was studied based on density functional theory (DFT) calculations to evaluate the nature of adsorption and to calculate the rate constant. The most stable configurations for H and CH3 were tested on the surface of Pt(111), and the results displayed that H tends to be adsorbed at the fcc site while CH3 tends to be adsorbed at the top site. The energy of barrier and rate constant of reaction were calculated and found to be (2.28 eV) and (3.21007E−08 s−1) respectively. In addition, the adsorption energy for the reactant and products to investigate the nature of adsorption of the reactant and products on Pt(111) surface either physisorption or chemisorption. The results showed that the kind of adsorption of CH4 adsorbed on the surface of Pt(111) at top site is physisorption, while CH3 and H species adsorption on the Pt(111) surface is chemisorption. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

 

Keywords: Methane dissociation; Pt(111) Surface; DFT; Density Functional Theory; reforming

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Section: Original Research Articles
Language : EN
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