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Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting
The development of efficient earth-abundant electrocatalysts for oxygen reduction, oxygen evolution, and hydrogen evolution reactions (ORR, OER, and HER) is important for future energy conversion and energy storage devices, for which both rechargeable Zn–air batteries and water splitting have raised...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Singapore
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6325096/ https://www.ncbi.nlm.nih.gov/pubmed/30687731 http://dx.doi.org/10.1007/s40820-018-0232-2 |
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author | Zhang, Jingyan Bai, Xiaowan Wang, Tongtong Xiao, Wen Xi, Pinxian Wang, Jinlan Gao, Daqiang Wang, John |
author_facet | Zhang, Jingyan Bai, Xiaowan Wang, Tongtong Xiao, Wen Xi, Pinxian Wang, Jinlan Gao, Daqiang Wang, John |
author_sort | Zhang, Jingyan |
collection | PubMed |
description | The development of efficient earth-abundant electrocatalysts for oxygen reduction, oxygen evolution, and hydrogen evolution reactions (ORR, OER, and HER) is important for future energy conversion and energy storage devices, for which both rechargeable Zn–air batteries and water splitting have raised great expectations. Herein, we report a single-phase bimetallic nickel cobalt sulfide ((Ni,Co)S(2)) as an efficient electrocatalyst for both OER and ORR. Owing to the synergistic combination of Ni and Co, the (Ni,Co)S(2) exhibits superior electrocatalytic performance for ORR, OER, and HER in an alkaline electrolyte, and the first principle calculation results indicate that the reaction of an adsorbed O atom with a H(2)O molecule to form a *OOH is the potential limiting step in the OER. Importantly, it could be utilized as an advanced air electrode material in Zn–air batteries, which shows an enhanced charge–discharge performance (charging voltage of 1.71 V and discharge voltage of 1.26 V at 2 mA cm(−2)), large specific capacity (842 mAh g(Zn)(−1) at 5 mA cm(−2)), and excellent cycling stability (480 h). Interestingly, the (Ni,Co)S(2)-based Zn–air battery can efficiently power an electrochemical water-splitting unit with (Ni,Co)S(2) serving as both the electrodes. This reveals that the prepared (Ni,Co)S(2) has promising applications in future energy conversion and energy storage devices. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-018-0232-2) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-6325096 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer Singapore |
record_format | MEDLINE/PubMed |
spelling | pubmed-63250962019-01-23 Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting Zhang, Jingyan Bai, Xiaowan Wang, Tongtong Xiao, Wen Xi, Pinxian Wang, Jinlan Gao, Daqiang Wang, John Nanomicro Lett Article The development of efficient earth-abundant electrocatalysts for oxygen reduction, oxygen evolution, and hydrogen evolution reactions (ORR, OER, and HER) is important for future energy conversion and energy storage devices, for which both rechargeable Zn–air batteries and water splitting have raised great expectations. Herein, we report a single-phase bimetallic nickel cobalt sulfide ((Ni,Co)S(2)) as an efficient electrocatalyst for both OER and ORR. Owing to the synergistic combination of Ni and Co, the (Ni,Co)S(2) exhibits superior electrocatalytic performance for ORR, OER, and HER in an alkaline electrolyte, and the first principle calculation results indicate that the reaction of an adsorbed O atom with a H(2)O molecule to form a *OOH is the potential limiting step in the OER. Importantly, it could be utilized as an advanced air electrode material in Zn–air batteries, which shows an enhanced charge–discharge performance (charging voltage of 1.71 V and discharge voltage of 1.26 V at 2 mA cm(−2)), large specific capacity (842 mAh g(Zn)(−1) at 5 mA cm(−2)), and excellent cycling stability (480 h). Interestingly, the (Ni,Co)S(2)-based Zn–air battery can efficiently power an electrochemical water-splitting unit with (Ni,Co)S(2) serving as both the electrodes. This reveals that the prepared (Ni,Co)S(2) has promising applications in future energy conversion and energy storage devices. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-018-0232-2) contains supplementary material, which is available to authorized users. Springer Singapore 2019-01-09 /pmc/articles/PMC6325096/ /pubmed/30687731 http://dx.doi.org/10.1007/s40820-018-0232-2 Text en © The Author(s) 2019 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Article Zhang, Jingyan Bai, Xiaowan Wang, Tongtong Xiao, Wen Xi, Pinxian Wang, Jinlan Gao, Daqiang Wang, John Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title | Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title_full | Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title_fullStr | Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title_full_unstemmed | Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title_short | Bimetallic Nickel Cobalt Sulfide as Efficient Electrocatalyst for Zn–Air Battery and Water Splitting |
title_sort | bimetallic nickel cobalt sulfide as efficient electrocatalyst for zn–air battery and water splitting |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6325096/ https://www.ncbi.nlm.nih.gov/pubmed/30687731 http://dx.doi.org/10.1007/s40820-018-0232-2 |
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