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Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model

Daniel R. Jones, Thierry G.G. Maffeïs, Thierry Maffeis Orcid Logo

Sensors and Actuators B: Chemical, Volume: 218, Pages: 16 - 24

Swansea University Author: Thierry Maffeis Orcid Logo

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DOI (Published version): 10.1016/j.snb.2015.04.072

Abstract

Herein, we experimentally test a mathematical model of the reactions on the surface of a zinc oxide nanosheet-based carbon monoxide sensor. The carbon monoxide is assumed to react with surface oxygen via an Eley–Rideal mechanism, considering only the direct reaction between the two species. We demon...

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Published in: Sensors and Actuators B: Chemical
ISSN: 0925-4005
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa21140
first_indexed 2015-05-07T02:10:13Z
last_indexed 2019-04-02T09:27:59Z
id cronfa21140
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spelling 2019-03-29T16:38:54.8634990 v2 21140 2015-05-06 Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model 992eb4cb18b61c0cd3da6e0215ac787c 0000-0003-2357-0092 Thierry Maffeis Thierry Maffeis true false 2015-05-06 ACEM Herein, we experimentally test a mathematical model of the reactions on the surface of a zinc oxide nanosheet-based carbon monoxide sensor. The carbon monoxide is assumed to react with surface oxygen via an Eley–Rideal mechanism, considering only the direct reaction between the two species. We demonstrate that the measured resistance responses of the system are well described by the model, facilitating further analysis of the physical rate constants in the system. By initially considering the system in the absence of any reducing gas, it is shown that various reaction parameters may be precisely estimated. For instance, fitting the model to response curves obtained at different temperatures shows the activation energy of the reaction between oxygen ions and carbon monoxide to be 54 ± 9 kJ mol−1, whereas the recovery curves yield an estimate of 42 ± 7 kJ mol−1. Similarly, the energy barrier for the formation of oxygen ions is found to equal 72 ± 9 kJ mol−1 from the sensor response and 63 ± 10 kJ mol−1 from the recovery. These estimates are in agreement with values quoted elsewhere in the literature, corroborating the validity of the model. In the absence of surface ions, the energy difference between the Fermi level and the conduction band minimum at the surface is estimated as 590 ± 90 meV. Journal Article Sensors and Actuators B: Chemical 218 16 24 0925-4005 31 10 2015 2015-10-31 10.1016/j.snb.2015.04.072 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University 2019-03-29T16:38:54.8634990 2015-05-06T17:00:50.8432344 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Daniel R. Jones 1 Thierry G.G. Maffeïs 2 Thierry Maffeis 0000-0003-2357-0092 3 0021140-07052015104853.pdf 2015__Eley-Rideal__model.pdf 2015-05-07T10:48:53.2970000 Output 883044 application/pdf Accepted Manuscript true 2016-05-07T00:00:00.0000000 true
title Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
spellingShingle Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
Thierry Maffeis
title_short Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
title_full Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
title_fullStr Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
title_full_unstemmed Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
title_sort Analysis of the kinetics of surface reactions on a zinc oxide nanosheet-based carbon monoxide sensor using an Eley–Rideal model
author_id_str_mv 992eb4cb18b61c0cd3da6e0215ac787c
author_id_fullname_str_mv 992eb4cb18b61c0cd3da6e0215ac787c_***_Thierry Maffeis
author Thierry Maffeis
author2 Daniel R. Jones
Thierry G.G. Maffeïs
Thierry Maffeis
format Journal article
container_title Sensors and Actuators B: Chemical
container_volume 218
container_start_page 16
publishDate 2015
institution Swansea University
issn 0925-4005
doi_str_mv 10.1016/j.snb.2015.04.072
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
active_str 0
description Herein, we experimentally test a mathematical model of the reactions on the surface of a zinc oxide nanosheet-based carbon monoxide sensor. The carbon monoxide is assumed to react with surface oxygen via an Eley–Rideal mechanism, considering only the direct reaction between the two species. We demonstrate that the measured resistance responses of the system are well described by the model, facilitating further analysis of the physical rate constants in the system. By initially considering the system in the absence of any reducing gas, it is shown that various reaction parameters may be precisely estimated. For instance, fitting the model to response curves obtained at different temperatures shows the activation energy of the reaction between oxygen ions and carbon monoxide to be 54 ± 9 kJ mol−1, whereas the recovery curves yield an estimate of 42 ± 7 kJ mol−1. Similarly, the energy barrier for the formation of oxygen ions is found to equal 72 ± 9 kJ mol−1 from the sensor response and 63 ± 10 kJ mol−1 from the recovery. These estimates are in agreement with values quoted elsewhere in the literature, corroborating the validity of the model. In the absence of surface ions, the energy difference between the Fermi level and the conduction band minimum at the surface is estimated as 590 ± 90 meV.
published_date 2015-10-31T18:43:54Z
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score 11.048302

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