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Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis

[Image: see text] Bimetallic iron–nickel-based nanocatalysts are perhaps the most active for the oxygen evolution reaction (OER) in alkaline electrolytes. Recent developments in literature have suggested that the ratio of iron and nickel in Fe–Ni thin films plays an essential role in the performance...

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Autores principales: Acharya, Prashant, Nelson, Zachary J., Benamara, Mourad, Manso, Ryan H., Bakovic, Sergio I. Perez, Abolhassani, Mojtaba, Lee, Sungsik, Reinhart, Benjamin, Chen, Jingyi, Greenlee, Lauren F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6811848/
https://www.ncbi.nlm.nih.gov/pubmed/31656894
http://dx.doi.org/10.1021/acsomega.9b01692
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author Acharya, Prashant
Nelson, Zachary J.
Benamara, Mourad
Manso, Ryan H.
Bakovic, Sergio I. Perez
Abolhassani, Mojtaba
Lee, Sungsik
Reinhart, Benjamin
Chen, Jingyi
Greenlee, Lauren F.
author_facet Acharya, Prashant
Nelson, Zachary J.
Benamara, Mourad
Manso, Ryan H.
Bakovic, Sergio I. Perez
Abolhassani, Mojtaba
Lee, Sungsik
Reinhart, Benjamin
Chen, Jingyi
Greenlee, Lauren F.
author_sort Acharya, Prashant
collection PubMed
description [Image: see text] Bimetallic iron–nickel-based nanocatalysts are perhaps the most active for the oxygen evolution reaction (OER) in alkaline electrolytes. Recent developments in literature have suggested that the ratio of iron and nickel in Fe–Ni thin films plays an essential role in the performance and stability of the catalysts. In this work, the metallic ratio of iron to nickel was tested in alloy bimetallic nanoparticles. Similar to thin films, nanoparticles with iron–nickel atomic compositions where the atomic iron percentage is ≤50% outperformed nanoparticles with iron–nickel ratios of >50%. Nanoparticles of Fe(20)Ni(80), Fe(50)Ni(50), and Fe(80)Ni(20) compositions were evaluated and demonstrated to have overpotentials of 313, 327,, and 364 mV, respectively, at a current density of 10 mA/cm(2). While the Fe(20)Ni(80) composition might be considered to have the best OER performance at low current densities, Fe(50)Ni(50) was found to have the best current density performance at higher current densities, making this composition particularly relevant for electrolysis conditions. However, when stability was evaluated through chronoamperometry and chronopotentiometry, the Fe(80)Ni(20) composition resulted in the lowest degradation rates of 2.9 μA/h and 17.2 μV/h, respectively. These results suggest that nanoparticles with higher iron and lower nickel content, such as the Fe(80)Ni(20) composition, should be still taken into consideration while optimizing these bimetallic OER catalysts for overall electrocatalytic performance. Characterization by electron microscopy, diffraction, and X-ray spectroscopy provides detailed chemical and structural information on as-synthesized nanoparticle materials.
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spelling pubmed-68118482019-10-25 Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis Acharya, Prashant Nelson, Zachary J. Benamara, Mourad Manso, Ryan H. Bakovic, Sergio I. Perez Abolhassani, Mojtaba Lee, Sungsik Reinhart, Benjamin Chen, Jingyi Greenlee, Lauren F. ACS Omega [Image: see text] Bimetallic iron–nickel-based nanocatalysts are perhaps the most active for the oxygen evolution reaction (OER) in alkaline electrolytes. Recent developments in literature have suggested that the ratio of iron and nickel in Fe–Ni thin films plays an essential role in the performance and stability of the catalysts. In this work, the metallic ratio of iron to nickel was tested in alloy bimetallic nanoparticles. Similar to thin films, nanoparticles with iron–nickel atomic compositions where the atomic iron percentage is ≤50% outperformed nanoparticles with iron–nickel ratios of >50%. Nanoparticles of Fe(20)Ni(80), Fe(50)Ni(50), and Fe(80)Ni(20) compositions were evaluated and demonstrated to have overpotentials of 313, 327,, and 364 mV, respectively, at a current density of 10 mA/cm(2). While the Fe(20)Ni(80) composition might be considered to have the best OER performance at low current densities, Fe(50)Ni(50) was found to have the best current density performance at higher current densities, making this composition particularly relevant for electrolysis conditions. However, when stability was evaluated through chronoamperometry and chronopotentiometry, the Fe(80)Ni(20) composition resulted in the lowest degradation rates of 2.9 μA/h and 17.2 μV/h, respectively. These results suggest that nanoparticles with higher iron and lower nickel content, such as the Fe(80)Ni(20) composition, should be still taken into consideration while optimizing these bimetallic OER catalysts for overall electrocatalytic performance. Characterization by electron microscopy, diffraction, and X-ray spectroscopy provides detailed chemical and structural information on as-synthesized nanoparticle materials. American Chemical Society 2019-10-11 /pmc/articles/PMC6811848/ /pubmed/31656894 http://dx.doi.org/10.1021/acsomega.9b01692 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Acharya, Prashant
Nelson, Zachary J.
Benamara, Mourad
Manso, Ryan H.
Bakovic, Sergio I. Perez
Abolhassani, Mojtaba
Lee, Sungsik
Reinhart, Benjamin
Chen, Jingyi
Greenlee, Lauren F.
Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title_full Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title_fullStr Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title_full_unstemmed Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title_short Chemical Structure of Fe–Ni Nanoparticles for Efficient Oxygen Evolution Reaction Electrocatalysis
title_sort chemical structure of fe–ni nanoparticles for efficient oxygen evolution reaction electrocatalysis
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6811848/
https://www.ncbi.nlm.nih.gov/pubmed/31656894
http://dx.doi.org/10.1021/acsomega.9b01692
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