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Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst
The conversion and storage of clean renewable energy can be achieved using water splitting. However, water splitting exhibits sluggish kinetics because of the high overpotentials of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) and should therefore be promoted by OER...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037640/ https://www.ncbi.nlm.nih.gov/pubmed/35480370 http://dx.doi.org/10.1039/d2ra01235a |
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author | Kim, Nam Woon Yu, Hyunung Oh, Jihun |
author_facet | Kim, Nam Woon Yu, Hyunung Oh, Jihun |
author_sort | Kim, Nam Woon |
collection | PubMed |
description | The conversion and storage of clean renewable energy can be achieved using water splitting. However, water splitting exhibits sluggish kinetics because of the high overpotentials of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) and should therefore be promoted by OER and/or HER electrocatalysts. As the kinetic barrier of the former reaction exceeds that of the latter, high-performance OER catalysts are highly sought after. Herein, K-doped NiCo(2)O(4) (HK-NCO) was hydrothermally prepared from a Prussian blue analog with a metal–organic framework structure and assessed as an OER catalyst. Extensive K doping increased the number of active oxygen vacancies and changed their intrinsic properties (e.g., binding energy), thus increasing conductivity. As a result, HK-NCO exhibited a Tafel slope of 49.9 mV dec(−1) and a low overpotential of 292 mV at 10 mA cm(−2), outperforming a commercial OER catalyst (Ir) and thus holding great promise as a component of high-performance electrode materials for metal-oxide batteries and supercapacitors. |
format | Online Article Text |
id | pubmed-9037640 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90376402022-04-26 Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst Kim, Nam Woon Yu, Hyunung Oh, Jihun RSC Adv Chemistry The conversion and storage of clean renewable energy can be achieved using water splitting. However, water splitting exhibits sluggish kinetics because of the high overpotentials of the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) and should therefore be promoted by OER and/or HER electrocatalysts. As the kinetic barrier of the former reaction exceeds that of the latter, high-performance OER catalysts are highly sought after. Herein, K-doped NiCo(2)O(4) (HK-NCO) was hydrothermally prepared from a Prussian blue analog with a metal–organic framework structure and assessed as an OER catalyst. Extensive K doping increased the number of active oxygen vacancies and changed their intrinsic properties (e.g., binding energy), thus increasing conductivity. As a result, HK-NCO exhibited a Tafel slope of 49.9 mV dec(−1) and a low overpotential of 292 mV at 10 mA cm(−2), outperforming a commercial OER catalyst (Ir) and thus holding great promise as a component of high-performance electrode materials for metal-oxide batteries and supercapacitors. The Royal Society of Chemistry 2022-04-25 /pmc/articles/PMC9037640/ /pubmed/35480370 http://dx.doi.org/10.1039/d2ra01235a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Kim, Nam Woon Yu, Hyunung Oh, Jihun Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title | Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title_full | Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title_fullStr | Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title_full_unstemmed | Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title_short | Mesoporous K-doped NiCo(2)O(4) derived from a Prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
title_sort | mesoporous k-doped nico(2)o(4) derived from a prussian blue analog: high-yielding synthesis and assessment as oxygen evolution reaction catalyst |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9037640/ https://www.ncbi.nlm.nih.gov/pubmed/35480370 http://dx.doi.org/10.1039/d2ra01235a |
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