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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...

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Autores principales: Fu, Chaoqun, Xu, Lijun, Dan, Zhenhua, Makino, Akihiro, Hara, Nobuyoshi, Qin, Fengxiang, Chang, Hui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
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.
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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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