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Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media
Silver-based electrocatalysts as promising substitutes for platinum materials for cathodic oxygen electroreduction have been extensively researched. Electrocatalytic enhancement of the Ag nanoarchitectonics can be obtained via support structures and amalgamating Ag with one or two additional metals....
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Beilstein-Institut
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9531560/ https://www.ncbi.nlm.nih.gov/pubmed/36247528 http://dx.doi.org/10.3762/bjnano.13.89 |
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author | Madakannu, Iyyappan Patil, Indrajit Kakade, Bhalchandra Datta, Kasibhatta Kumara Ramanatha |
author_facet | Madakannu, Iyyappan Patil, Indrajit Kakade, Bhalchandra Datta, Kasibhatta Kumara Ramanatha |
author_sort | Madakannu, Iyyappan |
collection | PubMed |
description | Silver-based electrocatalysts as promising substitutes for platinum materials for cathodic oxygen electroreduction have been extensively researched. Electrocatalytic enhancement of the Ag nanoarchitectonics can be obtained via support structures and amalgamating Ag with one or two additional metals. The work presented here deals with a facile microwave-assisted synthesis to produce bimetallic Ag-Cu and Ag-Co (1:1) oxide nanoparticles (NPs) and trimetallic AgCuCo (0.6:1.5:1.5, 2:1:1, and 6:1:1) oxide NPs supported on a reduced graphene oxide (rGO) matrix. Morphology, composition, and functional groups were methodically analysed using various microscopic and spectroscopic techniques. The as-prepared electrocatalysts were employed as cathode substrates for the oxygen reduction reaction (ORR) in alkaline medium. Varying the Ag fraction in copper cobalt oxide has a significant influence on the ORR activity. At a ratio of 2:1:1, AgCuCo oxide NPs on rGO displayed the best values for onset potential, half-wave potential, and limiting current density (J(k)) of 0.94 V vs RHE, 0.78 V, and 3.6 mA·cm(−2), respectively, with an electrochemical active surface area of 66.92 m(2)·g(−1) and a mass activity of 40.55 mA·mg(−1). The optimum electrocatalyst shows considerable electrochemical stability over 10,000 cycles in 0.1 M KOH solution. |
format | Online Article Text |
id | pubmed-9531560 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-95315602022-10-13 Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media Madakannu, Iyyappan Patil, Indrajit Kakade, Bhalchandra Datta, Kasibhatta Kumara Ramanatha Beilstein J Nanotechnol Full Research Paper Silver-based electrocatalysts as promising substitutes for platinum materials for cathodic oxygen electroreduction have been extensively researched. Electrocatalytic enhancement of the Ag nanoarchitectonics can be obtained via support structures and amalgamating Ag with one or two additional metals. The work presented here deals with a facile microwave-assisted synthesis to produce bimetallic Ag-Cu and Ag-Co (1:1) oxide nanoparticles (NPs) and trimetallic AgCuCo (0.6:1.5:1.5, 2:1:1, and 6:1:1) oxide NPs supported on a reduced graphene oxide (rGO) matrix. Morphology, composition, and functional groups were methodically analysed using various microscopic and spectroscopic techniques. The as-prepared electrocatalysts were employed as cathode substrates for the oxygen reduction reaction (ORR) in alkaline medium. Varying the Ag fraction in copper cobalt oxide has a significant influence on the ORR activity. At a ratio of 2:1:1, AgCuCo oxide NPs on rGO displayed the best values for onset potential, half-wave potential, and limiting current density (J(k)) of 0.94 V vs RHE, 0.78 V, and 3.6 mA·cm(−2), respectively, with an electrochemical active surface area of 66.92 m(2)·g(−1) and a mass activity of 40.55 mA·mg(−1). The optimum electrocatalyst shows considerable electrochemical stability over 10,000 cycles in 0.1 M KOH solution. Beilstein-Institut 2022-09-26 /pmc/articles/PMC9531560/ /pubmed/36247528 http://dx.doi.org/10.3762/bjnano.13.89 Text en Copyright © 2022, Madakannu et al. https://creativecommons.org/licenses/by/4.0/This is an open access article licensed under the terms of the Beilstein-Institut Open Access License Agreement (https://www.beilstein-journals.org/bjnano/terms/terms), which is identical to the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0 (https://creativecommons.org/licenses/by/4.0/) ). The reuse of material under this license requires that the author(s), source and license are credited. Third-party material in this article could be subject to other licenses (typically indicated in the credit line), and in this case, users are required to obtain permission from the license holder to reuse the material. |
spellingShingle | Full Research Paper Madakannu, Iyyappan Patil, Indrajit Kakade, Bhalchandra Datta, Kasibhatta Kumara Ramanatha Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title | Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title_full | Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title_fullStr | Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title_full_unstemmed | Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title_short | Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media |
title_sort | electrocatalytic oxygen reduction activity of agcocu oxides on reduced graphene oxide in alkaline media |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9531560/ https://www.ncbi.nlm.nih.gov/pubmed/36247528 http://dx.doi.org/10.3762/bjnano.13.89 |
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