Energy harvesting in the course of acid solution neutralization

This work investigates electrodes consisting of phosphomolybdic acid/reduced graphene oxide (PMo/RGO) and copper hexacyanoferrate (CuHCF) for proton adsorption/desorption and alkali metal ion intercalation/deintercalation, respectively. These electrodes can be used to harvest the energy resulting fr...

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Detalhes bibliográficos
Autores: Tainá, Bianca, Rueda-García, Daniel, Gómez-Romero, P., Huguenin, Fritz
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2022
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/289809
Acesso em linha:http://hdl.handle.net/10261/289809
Access Level:Acceso aberto
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spelling Energy harvesting in the course of acid solution neutralizationTainá, BiancaRueda-García, DanielGómez-Romero, P.Huguenin, FritzThis work investigates electrodes consisting of phosphomolybdic acid/reduced graphene oxide (PMo/RGO) and copper hexacyanoferrate (CuHCF) for proton adsorption/desorption and alkali metal ion intercalation/deintercalation, respectively. These electrodes can be used to harvest the energy resulting from the difference in ion concentrations during acid solution neutralization. HPMoO clusters were uniformly anchored on RGO sheets to ensure large electrode surface area and to facilitate proton access to the polyoxometalate electroactive sites. On the other hand, compared to iron ions in Prussian Blue, copper ions in the hexacyanometalate structure provided higher potassium ion intercalation/deintercalation rate. The experiments were performed in the time and frequency domains, and thermodynamic and kinetic models were proposed to improve our understanding of how the electrochemical system behaves with respect to energy harvesting. The reactions presented low energy dissipation due to low charge transfer resistance and diffusion impedance. The predicted energy harvested by the electrochemical full cell was 13.5 and 10.7 kJ per mol of adsorbed proton at 0.1 and 1.0 mA cm in acidic (pH = 2) and slightly acidic (pH = 6) media, respectively, which included acetate buffer and the feedback of the saline solution resulting from neutralization. The electrodes used here provided increased energy harvesting and power density compared to other electrode materials employed for the same purposes. Indeed, energy harvesting from acidic wastewater treatment can be a profitable and sustainable practice mainly for industries that generate enormous amounts of wastewater.We are grateful to FAPESP (Project 2018/07906-9 and 2021/12735-1) and CNPq (Project 140499/2021-0) for financial support.Peer reviewedElsevierFundação de Amparo à Pesquisa do Estado de São PauloConselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2023202320222023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/289809reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésIngléshttp://dx.doi.org/10.1016/j.jelechem.2022.116957Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2898092026-05-22T06:33:51Z
dc.title.none.fl_str_mv Energy harvesting in the course of acid solution neutralization
title Energy harvesting in the course of acid solution neutralization
spellingShingle Energy harvesting in the course of acid solution neutralization
Tainá, Bianca
title_short Energy harvesting in the course of acid solution neutralization
title_full Energy harvesting in the course of acid solution neutralization
title_fullStr Energy harvesting in the course of acid solution neutralization
title_full_unstemmed Energy harvesting in the course of acid solution neutralization
title_sort Energy harvesting in the course of acid solution neutralization
dc.creator.none.fl_str_mv Tainá, Bianca
Rueda-García, Daniel
Gómez-Romero, P.
Huguenin, Fritz
author Tainá, Bianca
author_facet Tainá, Bianca
Rueda-García, Daniel
Gómez-Romero, P.
Huguenin, Fritz
author_role author
author2 Rueda-García, Daniel
Gómez-Romero, P.
Huguenin, Fritz
author2_role author
author
author
dc.contributor.none.fl_str_mv Fundação de Amparo à Pesquisa do Estado de São Paulo
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description This work investigates electrodes consisting of phosphomolybdic acid/reduced graphene oxide (PMo/RGO) and copper hexacyanoferrate (CuHCF) for proton adsorption/desorption and alkali metal ion intercalation/deintercalation, respectively. These electrodes can be used to harvest the energy resulting from the difference in ion concentrations during acid solution neutralization. HPMoO clusters were uniformly anchored on RGO sheets to ensure large electrode surface area and to facilitate proton access to the polyoxometalate electroactive sites. On the other hand, compared to iron ions in Prussian Blue, copper ions in the hexacyanometalate structure provided higher potassium ion intercalation/deintercalation rate. The experiments were performed in the time and frequency domains, and thermodynamic and kinetic models were proposed to improve our understanding of how the electrochemical system behaves with respect to energy harvesting. The reactions presented low energy dissipation due to low charge transfer resistance and diffusion impedance. The predicted energy harvested by the electrochemical full cell was 13.5 and 10.7 kJ per mol of adsorbed proton at 0.1 and 1.0 mA cm in acidic (pH = 2) and slightly acidic (pH = 6) media, respectively, which included acetate buffer and the feedback of the saline solution resulting from neutralization. The electrodes used here provided increased energy harvesting and power density compared to other electrode materials employed for the same purposes. Indeed, energy harvesting from acidic wastewater treatment can be a profitable and sustainable practice mainly for industries that generate enormous amounts of wastewater.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/289809
url http://hdl.handle.net/10261/289809
dc.language.none.fl_str_mv Inglés
Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.jelechem.2022.116957
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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