An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity
Main Author: | |
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Publication Date: | 2022 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UnB |
Download full: | http://repositorio2.unb.br/jspui/handle/10482/46327 https://doi.org/10.3390/nano12081315 https://orcid.org/0000-0001-7434-1885 https://orcid.org/0000-0001-9109-6180 |
Summary: | This study shows the results, for the first time, of an glycerol alkaline-acid electrolyzer. Such a configuration allows spontaneous operation, producing energy and hydrogen simultaneously as a result of the utilization of the neutralization and fuel chemical energy. The electroreformer—built with a 20 wt% Pd/C anode and cathode, and a Na+-pretreated Nafion® 117—can simultaneously produce hydrogen and electricity in the low current density region, whereas it operates in electrolysis mode at high current densities. In the spontaneous region, the maximum power densities range from 1.23 mW cm−2 at 30 °C to 11.9 mW cm−2 at 90 °C, with a concomitant H2 flux ranging from 0.0545 STP m−3 m−2 h−1 at 30 °C to 0.201 STP m−3 m−2 h−1 at 90 °C, due to the beneficial effect of the temperature on the performance. Furthermore, over a chronoamperometric test, the electroreformer shows a stable performance over 12 h. As a challenge, proton crossover from the cathode to the anode through the cation exchange Nafion® partially reduces the pH gradient, responsible for the extra electromotive force, thus requiring a less permeable membrane. |
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Amorim, Fernando M. de LinoCrisafulli, RudyLinare Leon, Jose JoaquinFederal University of Goiás, Institute of ChemistryUniversity of Brasilia, Institute of ChemistryUniversity of Brasilia, Institute of Chemistry2023-08-16T13:09:38Z2023-08-16T13:09:38Z2022-04-12AMORIM, Fernando M. de Lino; CRISAFULLI, Rudy; LINARE LEON, Jose Joaquin. An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity. Nanomaterials, [S.l.], v. 12, n. 8, p. 25-30, 2022. DOI: https://www.mdpi.com/2079-4991/12/8/1315. Acesso em: 17 jul. 2023.http://repositorio2.unb.br/jspui/handle/10482/46327https://doi.org/10.3390/nano12081315https://orcid.org/0000-0001-7434-1885https://orcid.org/0000-0001-9109-6180engMDPI© 2022 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 (https://creativecommons.org/licenses/by/4.0/).info:eu-repo/semantics/openAccessAn alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleGlicerolHidrogênioEletróliseThis study shows the results, for the first time, of an glycerol alkaline-acid electrolyzer. Such a configuration allows spontaneous operation, producing energy and hydrogen simultaneously as a result of the utilization of the neutralization and fuel chemical energy. The electroreformer—built with a 20 wt% Pd/C anode and cathode, and a Na+-pretreated Nafion® 117—can simultaneously produce hydrogen and electricity in the low current density region, whereas it operates in electrolysis mode at high current densities. In the spontaneous region, the maximum power densities range from 1.23 mW cm−2 at 30 °C to 11.9 mW cm−2 at 90 °C, with a concomitant H2 flux ranging from 0.0545 STP m−3 m−2 h−1 at 30 °C to 0.201 STP m−3 m−2 h−1 at 90 °C, due to the beneficial effect of the temperature on the performance. Furthermore, over a chronoamperometric test, the electroreformer shows a stable performance over 12 h. As a challenge, proton crossover from the cathode to the anode through the cation exchange Nafion® partially reduces the pH gradient, responsible for the extra electromotive force, thus requiring a less permeable membrane.Instituto de Química (IQ)reponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNBORIGINALARTIGO_AnAlkaline-AcidGlycerol.pdfARTIGO_AnAlkaline-AcidGlycerol.pdfapplication/pdf1789859http://repositorio2.unb.br/jspui/bitstream/10482/46327/1/ARTIGO_AnAlkaline-AcidGlycerol.pdf96a45f2cec5e1c0f201f8756d12371b2MD51open accessLICENSElicense.txtlicense.txttext/plain102http://repositorio2.unb.br/jspui/bitstream/10482/46327/2/license.txtaed4704d04bb260d4decd80db311aaa5MD52open access10482/463272023-08-16 10:09:38.631open accessoai:repositorio2.unb.br:10482/46327U3VibWlzc8OjbyBlZmV0aXZhZGEgZGUgYWNvcmRvIGNvbSBsaWNlbsOnYSBjb25jZWRpZGEgcGVsbyBhdXRvciBlL291IGRldGVudG9yIGRvcyBkaXJlaXRvcyBhdXRvcmFpcy4KBiblioteca Digital de Teses e DissertaçõesPUBhttps://repositorio.unb.br/oai/requestopendoar:2023-08-16T13:09:38Repositório Institucional da UnB - Universidade de Brasília (UnB)false |
dc.title.pt_BR.fl_str_mv |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
title |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
spellingShingle |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity Amorim, Fernando M. de Lino Glicerol Hidrogênio Eletrólise |
title_short |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
title_full |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
title_fullStr |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
title_full_unstemmed |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
title_sort |
An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity |
author |
Amorim, Fernando M. de Lino |
author_facet |
Amorim, Fernando M. de Lino Crisafulli, Rudy Linare Leon, Jose Joaquin |
author_role |
author |
author2 |
Crisafulli, Rudy Linare Leon, Jose Joaquin |
author2_role |
author author |
dc.contributor.affiliation.pt_BR.fl_str_mv |
Federal University of Goiás, Institute of Chemistry University of Brasilia, Institute of Chemistry University of Brasilia, Institute of Chemistry |
dc.contributor.author.fl_str_mv |
Amorim, Fernando M. de Lino Crisafulli, Rudy Linare Leon, Jose Joaquin |
dc.subject.keyword.pt_BR.fl_str_mv |
Glicerol Hidrogênio Eletrólise |
topic |
Glicerol Hidrogênio Eletrólise |
description |
This study shows the results, for the first time, of an glycerol alkaline-acid electrolyzer. Such a configuration allows spontaneous operation, producing energy and hydrogen simultaneously as a result of the utilization of the neutralization and fuel chemical energy. The electroreformer—built with a 20 wt% Pd/C anode and cathode, and a Na+-pretreated Nafion® 117—can simultaneously produce hydrogen and electricity in the low current density region, whereas it operates in electrolysis mode at high current densities. In the spontaneous region, the maximum power densities range from 1.23 mW cm−2 at 30 °C to 11.9 mW cm−2 at 90 °C, with a concomitant H2 flux ranging from 0.0545 STP m−3 m−2 h−1 at 30 °C to 0.201 STP m−3 m−2 h−1 at 90 °C, due to the beneficial effect of the temperature on the performance. Furthermore, over a chronoamperometric test, the electroreformer shows a stable performance over 12 h. As a challenge, proton crossover from the cathode to the anode through the cation exchange Nafion® partially reduces the pH gradient, responsible for the extra electromotive force, thus requiring a less permeable membrane. |
publishDate |
2022 |
dc.date.issued.fl_str_mv |
2022-04-12 |
dc.date.accessioned.fl_str_mv |
2023-08-16T13:09:38Z |
dc.date.available.fl_str_mv |
2023-08-16T13:09:38Z |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
AMORIM, Fernando M. de Lino; CRISAFULLI, Rudy; LINARE LEON, Jose Joaquin. An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity. Nanomaterials, [S.l.], v. 12, n. 8, p. 25-30, 2022. DOI: https://www.mdpi.com/2079-4991/12/8/1315. Acesso em: 17 jul. 2023. |
dc.identifier.uri.fl_str_mv |
http://repositorio2.unb.br/jspui/handle/10482/46327 |
dc.identifier.doi.pt_BR.fl_str_mv |
https://doi.org/10.3390/nano12081315 |
dc.identifier.orcid.pt_BR.fl_str_mv |
https://orcid.org/0000-0001-7434-1885 https://orcid.org/0000-0001-9109-6180 |
identifier_str_mv |
AMORIM, Fernando M. de Lino; CRISAFULLI, Rudy; LINARE LEON, Jose Joaquin. An alkaline-acid glycerol electrochemical reformer for simultaneous production of hydrogen and electricity. Nanomaterials, [S.l.], v. 12, n. 8, p. 25-30, 2022. DOI: https://www.mdpi.com/2079-4991/12/8/1315. Acesso em: 17 jul. 2023. |
url |
http://repositorio2.unb.br/jspui/handle/10482/46327 https://doi.org/10.3390/nano12081315 https://orcid.org/0000-0001-7434-1885 https://orcid.org/0000-0001-9109-6180 |
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eng |
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