Item type |
文献 / Documents(1) |
公開日 |
2020-12-18 |
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アクセス権 |
open access |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
出版社版DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1021/acs.jpcc.9b03897 |
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言語 |
ja |
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関連名称 |
10.1021/acs.jpcc.9b03897 |
出版タイプ |
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出版タイプ |
AM |
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出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
タイトル |
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タイトル |
Evaluation of the Electronic and Local Structure of Mn in Proton-Conducting Oxide, Ca(Zr,Mn)O3-δ, To Elucidate a Direct Hydrogen Dissolution Reaction |
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言語 |
en |
タイトル別表記 |
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その他のタイトル |
Evaluation of the Electronic and Local Structure of Mn in Proton-Conducting Oxide, Ca(Zr,Mn)O3-δ, To Elucidate a Direct Hydrogen-Dissolution Reaction |
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言語 |
en |
著者 |
大石, 昌嗣
ナカムラ, タカシ
ワタナベ, イワオ
山本, 孝
ドイ, タクヤ
イナ, トシアキ
ニッタ, キヨフミ
アメザワ, コウジ
オクヤマ, ユウジ
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The protonation mechanism in Mn-doped CaZrO3 (CZM), which involves a direct hydrogen dissolution from the surrounding H2 gas, was investigated by thermogravimetry (TG) and X-ray absorption spectroscopy (XAS). The TG results implied the formation of oxygen vacancies in a H2 atmosphere. The Mn K-edge XAS spectra indicated a reduction of the Mn ions and local structure variations around the Mn ion, but the Zr K-edge spectra were independent of the surrounding atmosphere. The amount of oxygen vacancies was smaller with respect to the reduction of the Mn ions, suggesting direct dissolution of hydrogen. Unlike many typical perovskite-type proton conductors, protonation by direct dissolution of hydrogen and not hydration was the predominant reaction in Mn-doped CaZrO3. Our experimental results demonstrated that the hydration reaction was suppressed because the oxygen vacancy was stable in the distorted ZrO6 symmetry in the CaZrO3 crystal host, whereas protonation proceeded by the direct dissolution of hydrogen stabilizing near the Mn ions in the interstitial sites at the distorted MnO6 octahedron symmetry. The experimental results showed that the structural configurations around dopants play important roles in the stabilization of protons in perovskite-type CZM materials. We demonstrated a new group of proton conductors that can overcome issues with conventional proton conductors by utilizing the direct hydrogen dissolution reaction. |
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言語 |
en |
書誌情報 |
en : The Journal of Physical Chemistry C
巻 123,
号 26,
p. 16034-16045,
発行日 2019-06-07
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収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
19327447 |
収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
19327455 |
収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA1217589X |
収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12192210 |
出版者 |
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出版者 |
ACS Publications |
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言語 |
en |
権利情報 |
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言語 |
en |
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権利情報 |
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.9b03897. |
EID |
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識別子 |
353044 |
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識別子タイプ |
URI |
言語 |
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言語 |
eng |