In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues

Abstract Cobalt Prussian blue analogues (Co-PBA; Na x Co[Fe(CN)6] y ), consisting of cyano-bridged transition metal network, –Fe–CN–Co–NC–Fe–, are promising cathode materials for Na-ion secondary batteries. In the oxidation process, oxidization of Fe and/or Co are compensated by Na+ deintercalation....

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Autores principales:	Hideharu Niwa, Toshiaki Moriya, Takayuki Shibata, Yuya Fukuzumi, Yutaka Moritomo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/482fc19fa7bf4f38acb48949ef6ea312
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spelling	oai:doaj.org-article:482fc19fa7bf4f38acb48949ef6ea3122021-12-02T10:54:24ZIn situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues10.1038/s41598-021-83699-82045-2322https://doaj.org/article/482fc19fa7bf4f38acb48949ef6ea3122021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83699-8https://doaj.org/toc/2045-2322Abstract Cobalt Prussian blue analogues (Co-PBA; Na x Co[Fe(CN)6] y ), consisting of cyano-bridged transition metal network, –Fe–CN–Co–NC–Fe–, are promising cathode materials for Na-ion secondary batteries. In the oxidation process, oxidization of Fe and/or Co are compensated by Na+ deintercalation. Here, we investigated the oxidization process of three Co-PBAs by means of in situ infrared absorption (IR) spectroscopy. With use of an empirical rule of the frequencies of the CN− stretching mode in ferrocyanide ([FeII(CN)6]4−) and ferricyanide ([FeIII(CN)6]3−), the oxidation processes of Co-PBAs were determined against the Fe concentration (y) and temperature (T). We will discuss the interrelation between the oxidation processes and Fe concentration (y).Hideharu NiwaToshiaki MoriyaTakayuki ShibataYuya FukuzumiYutaka MoritomoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hideharu Niwa Toshiaki Moriya Takayuki Shibata Yuya Fukuzumi Yutaka Moritomo In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
description	Abstract Cobalt Prussian blue analogues (Co-PBA; Na x Co[Fe(CN)6] y ), consisting of cyano-bridged transition metal network, –Fe–CN–Co–NC–Fe–, are promising cathode materials for Na-ion secondary batteries. In the oxidation process, oxidization of Fe and/or Co are compensated by Na+ deintercalation. Here, we investigated the oxidization process of three Co-PBAs by means of in situ infrared absorption (IR) spectroscopy. With use of an empirical rule of the frequencies of the CN− stretching mode in ferrocyanide ([FeII(CN)6]4−) and ferricyanide ([FeIII(CN)6]3−), the oxidation processes of Co-PBAs were determined against the Fe concentration (y) and temperature (T). We will discuss the interrelation between the oxidation processes and Fe concentration (y).
format	article
author	Hideharu Niwa Toshiaki Moriya Takayuki Shibata Yuya Fukuzumi Yutaka Moritomo
author_facet	Hideharu Niwa Toshiaki Moriya Takayuki Shibata Yuya Fukuzumi Yutaka Moritomo
author_sort	Hideharu Niwa
title	In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
title_short	In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
title_full	In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
title_fullStr	In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
title_full_unstemmed	In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues
title_sort	in situ ir spectroscopy during oxidation process of cobalt prussian blue analogues
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/482fc19fa7bf4f38acb48949ef6ea312
work_keys_str_mv	AT hideharuniwa insituirspectroscopyduringoxidationprocessofcobaltprussianblueanalogues AT toshiakimoriya insituirspectroscopyduringoxidationprocessofcobaltprussianblueanalogues AT takayukishibata insituirspectroscopyduringoxidationprocessofcobaltprussianblueanalogues AT yuyafukuzumi insituirspectroscopyduringoxidationprocessofcobaltprussianblueanalogues AT yutakamoritomo insituirspectroscopyduringoxidationprocessofcobaltprussianblueanalogues
_version_	1718396466110660608

In situ IR spectroscopy during oxidation process of cobalt Prussian blue analogues

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