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Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis
As an attempt to improve the catalytic processes in different electrochemical systems, molybdenum dioxide nanoparticles were prepared using the hydrothermal method, and their electrical and dielectric properties were investigated. The nanoparticles were polycrystalline with an orthorhombic structure...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569991/ https://www.ncbi.nlm.nih.gov/pubmed/37842567 http://dx.doi.org/10.1016/j.heliyon.2023.e20610 |
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author | Soliman, Ibrahim Basnet, Bijaya K. Sahu, Sulata Panthi, Dhruba Du, Yanhai |
author_facet | Soliman, Ibrahim Basnet, Bijaya K. Sahu, Sulata Panthi, Dhruba Du, Yanhai |
author_sort | Soliman, Ibrahim |
collection | PubMed |
description | As an attempt to improve the catalytic processes in different electrochemical systems, molybdenum dioxide nanoparticles were prepared using the hydrothermal method, and their electrical and dielectric properties were investigated. The nanoparticles were polycrystalline with an orthorhombic structure. AC electrical transport properties of the pressed disc were conducted over a temperature range of 303–423 K and a frequency range of 42–5 × 10(6) Hz. The AC conductivity follows Jonscher's universal dynamic law, and it has been determined that correlated barrier hopping (CBH) is the primary conduction mechanism. The maximum barrier height ([Formula: see text]) was found to be 0.92 eV. The low activation energy showed that hopping conduction is the dominant mechanism of transporting current. The dielectric parameters were analyzed using both complex permittivity and complex electric modulus, with a focus on how they vary with temperature and frequency. At relatively high temperatures and low frequencies, the dielectric parameters showed a high-frequency dependence. The dielectric modulus showed that relaxation peaks move towards lower frequency when temperature increases. The dielectric relaxation activation energy, Δ [Formula: see text] was determined to be 0.31 eV. |
format | Online Article Text |
id | pubmed-10569991 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-105699912023-10-14 Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis Soliman, Ibrahim Basnet, Bijaya K. Sahu, Sulata Panthi, Dhruba Du, Yanhai Heliyon Research Article As an attempt to improve the catalytic processes in different electrochemical systems, molybdenum dioxide nanoparticles were prepared using the hydrothermal method, and their electrical and dielectric properties were investigated. The nanoparticles were polycrystalline with an orthorhombic structure. AC electrical transport properties of the pressed disc were conducted over a temperature range of 303–423 K and a frequency range of 42–5 × 10(6) Hz. The AC conductivity follows Jonscher's universal dynamic law, and it has been determined that correlated barrier hopping (CBH) is the primary conduction mechanism. The maximum barrier height ([Formula: see text]) was found to be 0.92 eV. The low activation energy showed that hopping conduction is the dominant mechanism of transporting current. The dielectric parameters were analyzed using both complex permittivity and complex electric modulus, with a focus on how they vary with temperature and frequency. At relatively high temperatures and low frequencies, the dielectric parameters showed a high-frequency dependence. The dielectric modulus showed that relaxation peaks move towards lower frequency when temperature increases. The dielectric relaxation activation energy, Δ [Formula: see text] was determined to be 0.31 eV. Elsevier 2023-10-06 /pmc/articles/PMC10569991/ /pubmed/37842567 http://dx.doi.org/10.1016/j.heliyon.2023.e20610 Text en © 2023 Published by Elsevier Ltd. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Soliman, Ibrahim Basnet, Bijaya K. Sahu, Sulata Panthi, Dhruba Du, Yanhai Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title | Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title_full | Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title_fullStr | Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title_full_unstemmed | Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title_short | Electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
title_sort | electrical and dielectric characteristics of molybdenum dioxide nanoparticles for high-performance electrocatalysis |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10569991/ https://www.ncbi.nlm.nih.gov/pubmed/37842567 http://dx.doi.org/10.1016/j.heliyon.2023.e20610 |
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