Proton-conducting oxide with redox protonation and its application to a hydrogen sensor with a self-standard electrode
| Autor: | Tsuneyoshi Koji, Naoki Matsunaga, Yuji Okuyama, Kimata Koji, Tomoko Oshima, Akira Nakajima, Shinya Nagamine, Fusako Takahashi, Go Sakai |
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| Rok vydání: | 2016 |
| Předmět: |
Working electrode
Standard hydrogen electrode Chemistry General Chemical Engineering Inorganic chemistry Absolute electrode potential Analytical chemistry 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrogen sensor 0104 chemical sciences Palladium-hydrogen electrode Reversible hydrogen electrode 0210 nano-technology Proton conductor |
| Zdroj: | RSC Advances. 6:34019-34026 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra23560j |
| Popis: | In order to simplify the structure of the EMF-type hydrogen sensor using a proton conductor as the electrolyte, an electrolyte serving as a self-standard electrode in air was developed. The electrochemical properties and proton dissolution mechanism of Mn-doped CaZrO3 were evaluated by impedance analysis, EMF measurement, IR absorption analysis and ESR measurement. Mn-doped CaZrO3 acquires a proton from hydrogen by reduction of the manganese ion. 5 mol% Mn doped CaZrO3 showed proton conduction in a reducing atmosphere and hole conduction in an oxidizing atmosphere. A gas concentration cell using CaZr0.95Mn0.05O3−δ as the electrolyte was constructed for use as a hydrogen sensor. It was found to be dependent only on the hydrogen potential of the working electrode when air was used as the reference gas. |
| Databáze: | OpenAIRE |
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