2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface

Abstract We have demonstrated that the process of hydrogen absorption into a solid experimentally follows a Langmuir-type (hyperbolic) function instead of Sieverts law. This can be explained by independent two theories. One is the well-known solubility theory which is the basis of Sieverts law. It e...

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Autores principales:	Taro Yakabe, Gaku Imamura, Genki Yoshikawa, Naoya Miyauchi, Masahiro Kitajima, Akiko N. Itakura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/44045b1ca3004bfaa65c850b068e43e1
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spelling	oai:doaj.org-article:44045b1ca3004bfaa65c850b068e43e12021-12-02T17:26:55Z2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface10.1038/s41598-021-98347-42045-2322https://doaj.org/article/44045b1ca3004bfaa65c850b068e43e12021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-98347-4https://doaj.org/toc/2045-2322Abstract We have demonstrated that the process of hydrogen absorption into a solid experimentally follows a Langmuir-type (hyperbolic) function instead of Sieverts law. This can be explained by independent two theories. One is the well-known solubility theory which is the basis of Sieverts law. It explains that the amount of hydrogen absorption can be expressed as a Langmuir-type (hyperbolic) function of the square root of the hydrogen pressure. We have succeeded in drawing the same conclusion from the other theory. It is a 2-step reaction kinetics (2sRK) model that expresses absorption into the bulk via adsorption on the surface. The 2sRK model has an advantage to the solubility theory: Since it can describe the dynamic process, it can be used to discuss both the amount of hydrogen absorption and the absorption rate. Some phenomena with absorption via adsorption can be understood in a unified manner by the 2sRK model.Taro YakabeGaku ImamuraGenki YoshikawaNaoya MiyauchiMasahiro KitajimaAkiko N. ItakuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Taro Yakabe Gaku Imamura Genki Yoshikawa Naoya Miyauchi Masahiro Kitajima Akiko N. Itakura 2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
description	Abstract We have demonstrated that the process of hydrogen absorption into a solid experimentally follows a Langmuir-type (hyperbolic) function instead of Sieverts law. This can be explained by independent two theories. One is the well-known solubility theory which is the basis of Sieverts law. It explains that the amount of hydrogen absorption can be expressed as a Langmuir-type (hyperbolic) function of the square root of the hydrogen pressure. We have succeeded in drawing the same conclusion from the other theory. It is a 2-step reaction kinetics (2sRK) model that expresses absorption into the bulk via adsorption on the surface. The 2sRK model has an advantage to the solubility theory: Since it can describe the dynamic process, it can be used to discuss both the amount of hydrogen absorption and the absorption rate. Some phenomena with absorption via adsorption can be understood in a unified manner by the 2sRK model.
format	article
author	Taro Yakabe Gaku Imamura Genki Yoshikawa Naoya Miyauchi Masahiro Kitajima Akiko N. Itakura
author_facet	Taro Yakabe Gaku Imamura Genki Yoshikawa Naoya Miyauchi Masahiro Kitajima Akiko N. Itakura
author_sort	Taro Yakabe
title	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
title_short	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
title_full	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
title_fullStr	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
title_full_unstemmed	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
title_sort	2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/44045b1ca3004bfaa65c850b068e43e1
work_keys_str_mv	AT taroyakabe 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface AT gakuimamura 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface AT genkiyoshikawa 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface AT naoyamiyauchi 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface AT masahirokitajima 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface AT akikonitakura 2stepreactionkineticsforhydrogenabsorptionintobulkmaterialviadissociativeadsorptiononthesurface
_version_	1718380783915237376

2-step reaction kinetics for hydrogen absorption into bulk material via dissociative adsorption on the surface

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