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Hydrogen Flux through Size Selected Pd Nanoparticles into Underlying Mg Nanofilms
https://oist.repo.nii.ac.jp/records/645
https://oist.repo.nii.ac.jp/records/6455a4ad477-b627-471f-82ad-19d3c561c87a
名前 / ファイル | ライセンス | アクション |
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Repository_Hydrogen Flux Through Size Selected Pd Nanoparticles into Underlying Mg Nanofilms-1 (4.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-09-23 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Hydrogen Flux through Size Selected Pd Nanoparticles into Underlying Mg Nanofilms | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Kumar, Sushant
× Kumar, Sushant× Pavloudis, Theodore× Singh, Vidyadhar× Nguyen, Hoa× Steinhauer, Stephan× Pursell, Christopher× Clemens, Bruce× Kioseoglou, Joseph× Grammatikopoulos, Panagiotis× Sowwan, Mukhles |
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書誌情報 |
en : Advanced Energy Materials 巻 8, 号 4, p. 1701326, 発行日 2017-09-22 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | The application of Mg for hydrogen storage is hindered due to the slow absorption of hydrogen in Mg films. Herein, the hydrogenation process is explored theoretically using density functional theory calculations, and energy barriers are compared for hydrogen diffusion through Pd nanoparticle/Mg film interfaces and their variations, i.e., Pd(H)/Mg(O). Decomposing the mechanism into basic steps, it is shown that Pd undergoes a strain‐induced crystallographic phase transformation near the interface, and indicated that hydrogen saturation of Pd nanoparticles enhances their efficiency as nanoportals. Using energetic arguments, it is explained why hydrogen diffusion is practically prohibited through native Mg oxide and seriously suppressed through existing hydride domains. Hydrogen flux is experimentally investigated through the nanoportals in Pd‐nanoparticle decorated Mg films by pressure‐composition isotherm measurements. An r ≈ t1/3 relationship is theoretically calculated for the radial growth of hemispherical hydride domains, and this relationship is confirmed by atomic force microscopy. The diffusion constant of hydrogen in Mg films is estimated as DHfilm ≈ 8 × 10−18 m2 s−1, based on transmission electron microscopy characterization. The unique nanoportal configuration allows direct measurement of hydride domain sizes, thus forming a model system for the experimental investigation of hydrogenation in any material. | |||||
出版者 | ||||||
出版者 | WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1614-6832 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1614-6840 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1002/aenm.201701326 | |||||
権利 | ||||||
権利情報 | © 2017 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim | |||||
権利 | ||||||
権利情報 | This is the peer reviewed version of the following article: Hydrogen Flux through Size Selected Pd Nanoparticles into Underlying Mg Nanofilms, which has been published in final form at http://dx.doi.org/10.1002/aenm.201701326. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201701326 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa |