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In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying
Palladium is a frequently used model system for hydrogen storage. During the past few decades, particular interest was placed on the superior H-absorption properties of nanostructured Pd systems. In the present study nanoporous palladium (np-Pd) is produced by electrochemical dealloying, an electroc...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5082345/ https://www.ncbi.nlm.nih.gov/pubmed/27826493 http://dx.doi.org/10.3762/bjnano.7.110 |
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author | Steyskal, Eva-Maria Wiednig, Christopher Enzinger, Norbert Würschum, Roland |
author_facet | Steyskal, Eva-Maria Wiednig, Christopher Enzinger, Norbert Würschum, Roland |
author_sort | Steyskal, Eva-Maria |
collection | PubMed |
description | Palladium is a frequently used model system for hydrogen storage. During the past few decades, particular interest was placed on the superior H-absorption properties of nanostructured Pd systems. In the present study nanoporous palladium (np-Pd) is produced by electrochemical dealloying, an electrochemical etching process that removes the less noble component from a master alloy. The volume and electrical resistance of np-Pd are investigated in situ upon electrochemical hydrogen loading and unloading. These properties clearly vary upon hydrogen ad- and absorption. During cyclic voltammetry in the hydrogen regime the electrical resistance changes reversibly by almost 10% upon absorbing approximately 5% H/Pd (atomic ratio). By suitable loading procedures, hydrogen concentrations up to almost 60% H/Pd were obtained, along with a sample thickness increase of about 5%. The observed reversible actuation clearly exceeds the values found in the literature, which is most likely due to the unique structure of np-Pd with an extraordinarily high surface-to-volume ratio. |
format | Online Article Text |
id | pubmed-5082345 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-50823452016-11-08 In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying Steyskal, Eva-Maria Wiednig, Christopher Enzinger, Norbert Würschum, Roland Beilstein J Nanotechnol Letter Palladium is a frequently used model system for hydrogen storage. During the past few decades, particular interest was placed on the superior H-absorption properties of nanostructured Pd systems. In the present study nanoporous palladium (np-Pd) is produced by electrochemical dealloying, an electrochemical etching process that removes the less noble component from a master alloy. The volume and electrical resistance of np-Pd are investigated in situ upon electrochemical hydrogen loading and unloading. These properties clearly vary upon hydrogen ad- and absorption. During cyclic voltammetry in the hydrogen regime the electrical resistance changes reversibly by almost 10% upon absorbing approximately 5% H/Pd (atomic ratio). By suitable loading procedures, hydrogen concentrations up to almost 60% H/Pd were obtained, along with a sample thickness increase of about 5%. The observed reversible actuation clearly exceeds the values found in the literature, which is most likely due to the unique structure of np-Pd with an extraordinarily high surface-to-volume ratio. Beilstein-Institut 2016-08-17 /pmc/articles/PMC5082345/ /pubmed/27826493 http://dx.doi.org/10.3762/bjnano.7.110 Text en Copyright © 2016, Steyskal et al. https://creativecommons.org/licenses/by/4.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms) |
spellingShingle | Letter Steyskal, Eva-Maria Wiednig, Christopher Enzinger, Norbert Würschum, Roland In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title | In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title_full | In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title_fullStr | In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title_full_unstemmed | In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title_short | In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
title_sort | in situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying |
topic | Letter |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5082345/ https://www.ncbi.nlm.nih.gov/pubmed/27826493 http://dx.doi.org/10.3762/bjnano.7.110 |
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