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Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys
Nanoporous electrodes have been fabricated by selectively dissolving the less noble α-Fe crystalline phase from nanocrystalline Fe(85.2)B(14–x)P(x)Cu(0.8) alloys (x= 0, 2, 4 at.%). The preferential dissolution is triggered by the weaker electrochemical stability of α-Fe nanocrystals than amorphous p...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5485788/ https://www.ncbi.nlm.nih.gov/pubmed/28594378 http://dx.doi.org/10.3390/nano7060141 |
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author | Fu, Chaoqun Xu, Lijun Dan, Zhenhua Makino, Akihiro Hara, Nobuyoshi Qin, Fengxiang Chang, Hui |
author_facet | Fu, Chaoqun Xu, Lijun Dan, Zhenhua Makino, Akihiro Hara, Nobuyoshi Qin, Fengxiang Chang, Hui |
author_sort | Fu, Chaoqun |
collection | PubMed |
description | Nanoporous electrodes have been fabricated by selectively dissolving the less noble α-Fe crystalline phase from nanocrystalline Fe(85.2)B(14–x)P(x)Cu(0.8) alloys (x= 0, 2, 4 at.%). The preferential dissolution is triggered by the weaker electrochemical stability of α-Fe nanocrystals than amorphous phase. The final nanoporous structure is mainly composed of amorphous residual phase and minor undissolved α-Fe crystals and can be predicted from initial microstructure of nanocrystalline precursor alloys. The structural inheritance is proved by the similarity of the size and outlines between nanopores formed after dealloying in 0.1 M H(2)SO(4) and α-Fe nanocrystals precipitated after annealing of amorphous Fe(85.2)B(14−x)P(x)Cu(0.8) (x = 0, 2, 4 at.%) alloys. The Redox peak current density of the nanoporous electrodes obtained from nanocrystalline Fe(85.2)B(10)P(4)Cu(0.8) alloys is more than one order higher than those of Fe plate electrode and its counterpart nanocrystalline alloys due to the large surface area and nearly-amorphous nature of ligaments. |
format | Online Article Text |
id | pubmed-5485788 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54857882017-06-29 Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys Fu, Chaoqun Xu, Lijun Dan, Zhenhua Makino, Akihiro Hara, Nobuyoshi Qin, Fengxiang Chang, Hui Nanomaterials (Basel) Article Nanoporous electrodes have been fabricated by selectively dissolving the less noble α-Fe crystalline phase from nanocrystalline Fe(85.2)B(14–x)P(x)Cu(0.8) alloys (x= 0, 2, 4 at.%). The preferential dissolution is triggered by the weaker electrochemical stability of α-Fe nanocrystals than amorphous phase. The final nanoporous structure is mainly composed of amorphous residual phase and minor undissolved α-Fe crystals and can be predicted from initial microstructure of nanocrystalline precursor alloys. The structural inheritance is proved by the similarity of the size and outlines between nanopores formed after dealloying in 0.1 M H(2)SO(4) and α-Fe nanocrystals precipitated after annealing of amorphous Fe(85.2)B(14−x)P(x)Cu(0.8) (x = 0, 2, 4 at.%) alloys. The Redox peak current density of the nanoporous electrodes obtained from nanocrystalline Fe(85.2)B(10)P(4)Cu(0.8) alloys is more than one order higher than those of Fe plate electrode and its counterpart nanocrystalline alloys due to the large surface area and nearly-amorphous nature of ligaments. MDPI 2017-06-08 /pmc/articles/PMC5485788/ /pubmed/28594378 http://dx.doi.org/10.3390/nano7060141 Text en © 2017 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 Fu, Chaoqun Xu, Lijun Dan, Zhenhua Makino, Akihiro Hara, Nobuyoshi Qin, Fengxiang Chang, Hui Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title | Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title_full | Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title_fullStr | Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title_full_unstemmed | Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title_short | Structural Inheritance and Redox Performance of Nanoporous Electrodes from Nanocrystalline Fe(85.2)B(10-14)P(0-4)Cu(0.8) Alloys |
title_sort | structural inheritance and redox performance of nanoporous electrodes from nanocrystalline fe(85.2)b(10-14)p(0-4)cu(0.8) alloys |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5485788/ https://www.ncbi.nlm.nih.gov/pubmed/28594378 http://dx.doi.org/10.3390/nano7060141 |
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