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Oxygen reduction at negatively charged iron porphyrins heat-treated and bridged by alkaline-earth metal ions
https://doi.org/10.24517/00009749
https://doi.org/10.24517/00009749b95e3985-8805-45e0-89d0-62b7e31b7dbc
名前 / ファイル | ライセンス | アクション |
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TE-PR-YAMAGUCHI-T-6042.pdf (984.3 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2017-10-03 | |||||
タイトル | ||||||
タイトル | Oxygen reduction at negatively charged iron porphyrins heat-treated and bridged by alkaline-earth metal ions | |||||
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 | |||||
ID登録 | ||||||
ID登録 | 10.24517/00009749 | |||||
ID登録タイプ | JaLC | |||||
著者 |
Yamaguchi, Takahiro
× Yamaguchi, Takahiro× Tsukamoto, Kengo× Ikeda, Osamu× Tanaka, Ryutaro× Kuwabara, Takayuki× Takahashi, Kohshin |
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著者別表示 |
山口, 孝浩
× 山口, 孝浩× 池田, 修× 田中, 隆太郎× 桑原, 貴之 |
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提供者所属 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 金沢大学理工研究域物質化学系 | |||||
書誌情報 |
Electrochimica Acta 巻 55, 号 20, p. 6042-6048, 発行日 2010-08-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0013-4686 | |||||
NCID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00633261 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.electacta.2010.05.064 | |||||
出版者 | ||||||
出版者 | Elsevier | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | An ordered network of tetrasodium tetra(4-sulphonatophenyl)porphyrin iron(III) chloride (FeTPPS4Na4), which exhibited a higher catalytic activity for oxygen reduction than Co and Ir(CO)TPPS 4Na4, was fabricated by complexation with alkaline-earth metal ions. Heat treatment of these complexes enhanced their catalytic activity with the highest performance observed with Ba2+-FeTPPS4. The onset potential for oxygen reduction (Eonset) was 720mVvs. Ag|AgCl, which is almost the same as that for Pt-impregnated carbon black. The number of electrons, n, transferred during oxygen reduction at a Ba2+- FeTPPS4-coated electrode, as determined by rotating ring-disc experiments, was 3.9 and suggests that oxygen was reduced to water. A neutral solution of FeTPPS4Na4 was acidified by the addition of barium ion, and the elemental ratio Fe:S:Ba in the resulting Ba 2+-FeTPPS4 complex was approximately 1:4:2.5. This suggests the formation of a highly ordered network with Fe sites bridged with barium ions in addition to the normal salt bridges between sulphonates. Catalytic oxidation reactions with nitric oxide and nitrite ion as the intermediate at the heat-treated Ba2+-FeTPPS4 indicate the formation of Fe(IV) and Fe(IV) π-cation radicals or Fe(V). The agreement between the potential of Fe(IV) π-cation radical formation and E onset suggests that the redox cycle of the Fe(III)/Fe(IV) π-cation radical provides a sufficient driving force for the observed 4-electron reduction of oxygen at the heat-treated Ba2+-FeTPPS4 electrode. © 2010 Elsevier Ltd. All rights reserved. | |||||
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 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | http://www.elsevier.com/locate/issn/00134686 |