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Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure

Bimetallic Pd(1−x)Pt(x) solid-solution nanoparticles (NPs) display charging/discharging of hydrogen gas, which has relevance for fuel cell technologies; however, the constituent elements are immiscible in the bulk phase. We examined these material systems using high-energy synchrotron X-ray diffract...

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Autores principales: Kumara, Loku Singgappulige Rosantha, Sakata, Osami, Kobayashi, Hirokazu, Song, Chulho, Kohara, Shinji, Ina, Toshiaki, Yoshimoto, Toshiki, Yoshioka, Satoru, Matsumura, Syo, Kitagawa, Hiroshi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5668347/
https://www.ncbi.nlm.nih.gov/pubmed/29097810
http://dx.doi.org/10.1038/s41598-017-14494-7
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author Kumara, Loku Singgappulige Rosantha
Sakata, Osami
Kobayashi, Hirokazu
Song, Chulho
Kohara, Shinji
Ina, Toshiaki
Yoshimoto, Toshiki
Yoshioka, Satoru
Matsumura, Syo
Kitagawa, Hiroshi
author_facet Kumara, Loku Singgappulige Rosantha
Sakata, Osami
Kobayashi, Hirokazu
Song, Chulho
Kohara, Shinji
Ina, Toshiaki
Yoshimoto, Toshiki
Yoshioka, Satoru
Matsumura, Syo
Kitagawa, Hiroshi
author_sort Kumara, Loku Singgappulige Rosantha
collection PubMed
description Bimetallic Pd(1−x)Pt(x) solid-solution nanoparticles (NPs) display charging/discharging of hydrogen gas, which has relevance for fuel cell technologies; however, the constituent elements are immiscible in the bulk phase. We examined these material systems using high-energy synchrotron X-ray diffraction, X-ray absorption fine structure and hard X-ray photoelectron spectroscopy techniques. Recent studies have demonstrated the hydrogen storage properties and catalytic activities of Pd-Pt alloys; however, comprehensive details of their structural and electronic functionality at the atomic scale have yet to be reported. Three-dimensional atomic-scale structure results obtained from the pair distribution function (PDF) and reverse Monte Carlo (RMC) methods suggest the formation of a highly disordered structure with a high cavity-volume-fraction for low-Pt content NPs. The NP conduction band features, as extracted from X-ray absorption near-edge spectra at the Pd and Pt L(III)-edge, suggest that the Pd conduction band is filled by Pt valence electrons. This behaviour is consistent with observations of the hydrogen storage capacity of these NPs. The broadening of the valence band width and the down-shift of the d-band centre away from the Fermi level upon Pt substitution also provided evidence for enhanced stability of the hydride (ΔH) features of the Pd(1−x)Pt(x) solid-solution NPs with a Pt content of 8-21 atomic percent.
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spelling pubmed-56683472017-11-15 Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure Kumara, Loku Singgappulige Rosantha Sakata, Osami Kobayashi, Hirokazu Song, Chulho Kohara, Shinji Ina, Toshiaki Yoshimoto, Toshiki Yoshioka, Satoru Matsumura, Syo Kitagawa, Hiroshi Sci Rep Article Bimetallic Pd(1−x)Pt(x) solid-solution nanoparticles (NPs) display charging/discharging of hydrogen gas, which has relevance for fuel cell technologies; however, the constituent elements are immiscible in the bulk phase. We examined these material systems using high-energy synchrotron X-ray diffraction, X-ray absorption fine structure and hard X-ray photoelectron spectroscopy techniques. Recent studies have demonstrated the hydrogen storage properties and catalytic activities of Pd-Pt alloys; however, comprehensive details of their structural and electronic functionality at the atomic scale have yet to be reported. Three-dimensional atomic-scale structure results obtained from the pair distribution function (PDF) and reverse Monte Carlo (RMC) methods suggest the formation of a highly disordered structure with a high cavity-volume-fraction for low-Pt content NPs. The NP conduction band features, as extracted from X-ray absorption near-edge spectra at the Pd and Pt L(III)-edge, suggest that the Pd conduction band is filled by Pt valence electrons. This behaviour is consistent with observations of the hydrogen storage capacity of these NPs. The broadening of the valence band width and the down-shift of the d-band centre away from the Fermi level upon Pt substitution also provided evidence for enhanced stability of the hydride (ΔH) features of the Pd(1−x)Pt(x) solid-solution NPs with a Pt content of 8-21 atomic percent. Nature Publishing Group UK 2017-11-03 /pmc/articles/PMC5668347/ /pubmed/29097810 http://dx.doi.org/10.1038/s41598-017-14494-7 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Kumara, Loku Singgappulige Rosantha
Sakata, Osami
Kobayashi, Hirokazu
Song, Chulho
Kohara, Shinji
Ina, Toshiaki
Yoshimoto, Toshiki
Yoshioka, Satoru
Matsumura, Syo
Kitagawa, Hiroshi
Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title_full Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title_fullStr Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title_full_unstemmed Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title_short Hydrogen storage and stability properties of Pd–Pt solid-solution nanoparticles revealed via atomic and electronic structure
title_sort hydrogen storage and stability properties of pd–pt solid-solution nanoparticles revealed via atomic and electronic structure
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5668347/
https://www.ncbi.nlm.nih.gov/pubmed/29097810
http://dx.doi.org/10.1038/s41598-017-14494-7
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