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Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping

To improve the thermochemical energy storage (TCS) behavior of Mn(2)O(3), several Mn–Mo oxides with varying amounts of MoO(3) (0–30 wt%) were prepared by a precipitation method. The physico-chemical properties of the solids were studied by N(2) adsorption–desorption, X-ray diffraction (XRD), scannin...

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Autores principales: Moya, Javier, Marugán, Javier, Orfila, María, Díaz-Pérez, Manuel Antonio, Serrano-Ruiz, Juan Carlos
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866177/
https://www.ncbi.nlm.nih.gov/pubmed/33499286
http://dx.doi.org/10.3390/molecules26030583
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author Moya, Javier
Marugán, Javier
Orfila, María
Díaz-Pérez, Manuel Antonio
Serrano-Ruiz, Juan Carlos
author_facet Moya, Javier
Marugán, Javier
Orfila, María
Díaz-Pérez, Manuel Antonio
Serrano-Ruiz, Juan Carlos
author_sort Moya, Javier
collection PubMed
description To improve the thermochemical energy storage (TCS) behavior of Mn(2)O(3), several Mn–Mo oxides with varying amounts of MoO(3) (0–30 wt%) were prepared by a precipitation method. The physico-chemical properties of the solids were studied by N(2) adsorption–desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), and H(2)-temperature-programmed reduction (TPR), while their TCS behavior was determined by thermogravimetric analysis coupled with differential scanning calorimetry (TGA-DSC). Apart from Mn(2)O(3) and MoO(3) phases, XRD revealed a mixed MnMoO(4) phase for MoO(3) loadings equal or higher than 1.5 wt%. All samples showed a well-formed coral-like surface morphology, particularly those solids with low MoO(3) contents. This coral morphology was progressively decorated with compact and Mo-enriched MnMoO(4) particles as the MoO(3) content increased. TPR revealed that the redox behavior of Mn(2)O(3) was significantly altered upon addition of Mo. The TCS behavior of Mn(2)O(3) (mostly oxidation kinetics and redox cyclability) was enhanced by addition of low amounts of Mo (0.6 and 1.5% MoO(3)) without significantly increasing the reduction temperature of the solids. The coral morphology (which facilitated oxygen diffusion) and a smoother transition from the reduced to oxidized phase were suggested to be responsible for this improved TCS behavior. The samples containing 0.6 and 1.5 wt% of MoO(3) showed outstanding cyclability after 45 consecutive reduction–oxidation cycles at high temperatures (600–1000 °C). These materials could potentially reach absorption efficiencies higher than 90% at concentration capacity values typical of concentrated solar power plants.
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spelling pubmed-78661772021-02-07 Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping Moya, Javier Marugán, Javier Orfila, María Díaz-Pérez, Manuel Antonio Serrano-Ruiz, Juan Carlos Molecules Article To improve the thermochemical energy storage (TCS) behavior of Mn(2)O(3), several Mn–Mo oxides with varying amounts of MoO(3) (0–30 wt%) were prepared by a precipitation method. The physico-chemical properties of the solids were studied by N(2) adsorption–desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), and H(2)-temperature-programmed reduction (TPR), while their TCS behavior was determined by thermogravimetric analysis coupled with differential scanning calorimetry (TGA-DSC). Apart from Mn(2)O(3) and MoO(3) phases, XRD revealed a mixed MnMoO(4) phase for MoO(3) loadings equal or higher than 1.5 wt%. All samples showed a well-formed coral-like surface morphology, particularly those solids with low MoO(3) contents. This coral morphology was progressively decorated with compact and Mo-enriched MnMoO(4) particles as the MoO(3) content increased. TPR revealed that the redox behavior of Mn(2)O(3) was significantly altered upon addition of Mo. The TCS behavior of Mn(2)O(3) (mostly oxidation kinetics and redox cyclability) was enhanced by addition of low amounts of Mo (0.6 and 1.5% MoO(3)) without significantly increasing the reduction temperature of the solids. The coral morphology (which facilitated oxygen diffusion) and a smoother transition from the reduced to oxidized phase were suggested to be responsible for this improved TCS behavior. The samples containing 0.6 and 1.5 wt% of MoO(3) showed outstanding cyclability after 45 consecutive reduction–oxidation cycles at high temperatures (600–1000 °C). These materials could potentially reach absorption efficiencies higher than 90% at concentration capacity values typical of concentrated solar power plants. MDPI 2021-01-22 /pmc/articles/PMC7866177/ /pubmed/33499286 http://dx.doi.org/10.3390/molecules26030583 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Moya, Javier
Marugán, Javier
Orfila, María
Díaz-Pérez, Manuel Antonio
Serrano-Ruiz, Juan Carlos
Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title_full Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title_fullStr Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title_full_unstemmed Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title_short Improved Thermochemical Energy Storage Behavior of Manganese Oxide by Molybdenum Doping
title_sort improved thermochemical energy storage behavior of manganese oxide by molybdenum doping
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866177/
https://www.ncbi.nlm.nih.gov/pubmed/33499286
http://dx.doi.org/10.3390/molecules26030583
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